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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt1
Bruce Mayer, PE Chabot College Mathematics
Bruce Mayer, PELicensed Electrical & Mechanical Engineer
[email protected]
Chabot Mathematics
§G §G TranslateTranslateRational Rational
PlotsPlots
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt2
Bruce Mayer, PE Chabot College Mathematics
Review §Review §
Any QUESTIONS About• §G → Graphing Rational Functions
Any QUESTIONS About HomeWork• §G → HW-22
G MTH 55
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt3
Bruce Mayer, PE Chabot College Mathematics
GRAPH BY PLOTTING POINTSGRAPH BY PLOTTING POINTS Step1. Make a representative
T-table of solutions of the equation.
Step 2. Plot the solutions as ordered pairs in the Cartesian coordinate plane.
Step 3. Connect the solutions (dots) in Step 2 by a smooth curve
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt4
Bruce Mayer, PE Chabot College Mathematics
Translation of GraphsTranslation of Graphs
Graph y = f(x) = x2. • Make T-Table & Connect-Dots
Select integers for x, starting with −2 and ending with +2. The T-table:
x 2xy Ordered Pair yx,
2 42 2 y 4,2
1 11 2 y 1,1
0 002 y 0,0
1 112 y 1,1
2 422 y 4,2
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt5
Bruce Mayer, PE Chabot College Mathematics
Translation of GraphsTranslation of Graphs
Now Plot the Five Points and connect them with a smooth Curve
-2
-1
0
1
2
3
4
5
6
-4 -3 -2 -1 0 1 2 3 4
M55_§JBerland_Graphs_0806.xls
x
y
(−2,4) (2,4)
(−1,1) (1,1)
(0,0)
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt6
Bruce Mayer, PE Chabot College Mathematics
Axes TranslationAxes Translation
Now Move UP the graph of y = x2 by two units as shown
y
x
-1
0
1
2
3
4
5
6
7
-4 -3 -2 -1 0 1 2 3 4
M55_§JBerland_Graphs_0806.xls
(−2,4) (2,4)
(−1,1) (1,1)
(0,0)
(−2,6) (2,6)
(−1,3) (1,3)
(0,2) What is the What is the
Equation Equation for the new for the new Curve?Curve?
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Bruce Mayer, PE Chabot College Mathematics
Axes TranslationAxes Translation
Compare ordered pairs on the graph of with the corresponding ordered pairs on the new curve:
2xy
New Curve (2 units up)
4,2 6,2
1,1 3,1
0,0 2,0
1,1 3,1
4,2 6,2
y
x
-1
0
1
2
3
4
5
6
7
-4 -3 -2 -1 0 1 2 3 4
M55_§JBerland_Graphs_0806.xls
(−2,4) (2,4)
(−1,1) (1,1)
(0,0)
(−2,6) (2,6)
(−1,3) (1,3)
(0,2)
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt8
Bruce Mayer, PE Chabot College Mathematics
Axes TranslationAxes Translation Notice that the x-coordinates
on the new curve are the same, but the y-coordinates are 2 units greater
So every point on the new curve makes the equation y = x2+2 true, and every point off the new curve makes the equation y = x2+2 false.
An equation for the new curve is thus
y = x2+2
2xy
New Curve (2 units up)
4,2 6,2
1,1 3,1
0,0 2,0
1,1 3,1
4,2 6,2
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt9
Bruce Mayer, PE Chabot College Mathematics
Axes TranslationAxes Translation
Similarly, if every point on the graph of y = x2 were is moved 2 units down, an equation of the new curve is y = x2−2
2xy
-3
-2
-1
0
1
2
3
4
5
-4 -3 -2 -1 0 1 2 3 4
M55_§JBerland_Graphs_0806.xls
y
x
22 xy
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt10
Bruce Mayer, PE Chabot College Mathematics
Axes TranslationAxes Translation
When every point on a graph is moved up or down by a given number of units, the new graph is called a vertical translation of the original graph.
y
x
-1
0
1
2
3
4
5
6
7
-4 -3 -2 -1 0 1 2 3 4
M55_§JBerland_Graphs_0806.xls
yy
xx
-1
0
1
2
3
4
5
6
7
-4 -3 -2 -1 0 1 2 3 4
M55_§JBerland_Graphs_0806.xls-3
-2
-1
0
1
2
3
4
5
-4 -3 -2 -1 0 1 2 3 4
M55_§JBerland_Graphs_0806.xls
y
x
-3
-2
-1
0
1
2
3
4
5
-4 -3 -2 -1 0 1 2 3 4
M55_§JBerland_Graphs_0806.xls
yy
xx
2xy 22 xy
2xy
22 xy
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt11
Bruce Mayer, PE Chabot College Mathematics
Vertical TranslationVertical Translation
Given the Graph of y = f(x), and c > 0
1. The graph of y = f(x) + c is a vertical translation c-units UP
2. The graph of y = f(x) − c is a vertical translation c-units DOWN
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt12
Bruce Mayer, PE Chabot College Mathematics
Horizontal TranslationHorizontal Translation What if every point on the graph of
y = x2 were moved 5 units to the right as shown below.
What is the eqn of the new curve?What is the eqn of the new curve?
2xy ?y
-2
-1
0
1
2
3
4
5
6
7
8
9
10
-3 -2 -1 0 1 2 3 4 5 6 7 8 9
Xlate_ABS_Graphs_1010.xls
x
y
(−2,4) (2,4) (3,4) (7,4)
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Bruce Mayer, PE Chabot College Mathematics
Horizontal TranslationHorizontal Translation
Compare ordered pairs on the graph of with the corresponding ordered pairs on the new curve:
2xy
New Curve
(5 units right)
4,2 4,3
1,1 1,4
0,0 0,5
1,1 1,6
4,2 4,7
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt14
Bruce Mayer, PE Chabot College Mathematics
Horizontal TranslationHorizontal Translation Notice that the y-coordinates on the
new curve are the same, but the x-coordinates are 5 units greater.
Does every point on the new curve make the equation y = (x+5)2 true? • No; for example if we input (5,0) we get 0 = (5+5)2,
which is false. • But if we input (5,0) into the equation y = (x−5)2 , we get
0 = (5−5)2 , which is TRUE.
In fact, every point on the new curve makes the equation y = (x−5)2 true, and every point off the new curve makes the equation y = (x−5)2 false. Thus an equation for the new curve is y = (x−5)2
2xy
New Curve
(5 units right)
4,2 4,3
1,1 1,4
0,0 0,5
1,1 1,6
4,2 4,7
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt15
Bruce Mayer, PE Chabot College Mathematics
Horizontal TranslationHorizontal Translation
Given the Graph of y = f(x), and c > 0
1. The graph of y = f(x−c) is a horizontal translation c-units to the RIGHT
2. The graph of y = f(x+c) is a horizontal translation c-units to the LEFT
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt16
Bruce Mayer, PE Chabot College Mathematics
Example Example Plot by Translation Plot by Translation
Use Translation to graph f(x) = (x−3)2−2 LET y = f(x) → y = (x−3)2−2 Notice that the graph of y = (x−3)2−2
has the same shape as y = x2, but is translated 3-unit RIGHT and 2-units DOWN.
In the y = (x−3)2−2, call −3 and −2 translators
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt17
Bruce Mayer, PE Chabot College Mathematics
Example Example Plot by Translation Plot by Translation
The graphs of y=x2 and y=(x−3)2−2 are different; although they have the Same shape they have different locations
Now remove the translators by a substitution of x’ (“x-prime”) for x, and y’ (“y-prime”) for y
Remove translators for an (x’,y’) eqn
22 23 xyxy
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt18
Bruce Mayer, PE Chabot College Mathematics
Example Example Plot by Translation Plot by Translation
Since the graph of y=(x−3)2−2 has the same shape as the graph of y’ =(x’)2 we can use ordered pairs of y’ =(x’)2 to determine the shape
T-tablefory’ =(x’)2
x y Ordered Pair yx ,
1 1 1,1
0 0 0,0
1 1 1,1
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt19
Bruce Mayer, PE Chabot College Mathematics
Example Example Plot by Translation Plot by Translation Next use the translation rules to find the
origin of the x’y’-plane. Draw the x’-axis and y’-axis through the translated origin 22 23 xyxy
• The origin of the x’y’-plane is 3 units right and 2 units down from the origin of the xy-plane.
• Through the translated origin, we use dashed lines to draw a new horizontal axis (the x’-axis) and a new vertical axis (the y’-axis).
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt20
Bruce Mayer, PE Chabot College Mathematics
Example Example Plot by Translation Plot by Translation
Locate the Origin of the Translated Axes Set using the translator values
Move: 3-Right, 2-Down
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt21
Bruce Mayer, PE Chabot College Mathematics
Example Example Plot by Translation Plot by Translation
Now Plot the ordered pairs of the x’y’ equation on the x’y’-plane, and use the points to draw an appropriate graph.• Remember that this graph is smooth
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt22
Bruce Mayer, PE Chabot College Mathematics
Example Example Plot by Translation Plot by Translation
Perform a partial-check to determine correctness of the last graph. Pick any point on the graph and find its (x,y) CoOrds; e.g., (4, −1) is on the graph
The Ordered Pair (4, −1) should make the xy Eqn True
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt23
Bruce Mayer, PE Chabot College Mathematics
Example Example Plot by Translation Plot by Translation
Sub (4, −1) into y=(x−3)2−2
23 2 xy:
11
2341 2
Thus (4, −1) does make y = (x−3)2−2 true. In fact, all the points on the translated graph make the original Eqn true, and all the points off the translated graph make the original Eqn false
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt24
Bruce Mayer, PE Chabot College Mathematics
Example Example Plot by Translation Plot by Translation
What are the Domain &Range of y=(x−3)2−2?
y
x
-3
-2
-1
0
1
2
3
4
5
6
7
-1 0 1 2 3 4 5 6 7 8 9
M55_§JBerland_Graphs_0806.xls
yy
xx
-3
-2
-1
0
1
2
3
4
5
6
7
-1 0 1 2 3 4 5 6 7 8 9
M55_§JBerland_Graphs_0806.xls
23 2 xy
To find the domain & range of the xy-eqn, examine the xy-graph (not the x’y’ graph).
The xy graph showns• Domain of f is {x|x is any real number}
• Range of f is {y|y ≥ −2}
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Bruce Mayer, PE Chabot College Mathematics
Graphing Using TranslationGraphing Using Translation
1. Let y = f(x)2. Remove the x-value & y-value
“translators” to form an x’y’ eqn.3. Find ordered pair solutions of the x’y’ eqn4. Use the translation rules to find the origin
of the x’y’-plane. Draw dashed x’ and y’ axes through the translated origin.
5. Plot the ordered pairs of the x’y’ equation on the x’y’-plane, and use the points to draw an appropriate graph.
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt26
Bruce Mayer, PE Chabot College Mathematics
Example Example ReCall Graph ReCall Graph yy = | = |xx||
Make T-tablex y = |x |
-6 6-5 5-4 4-3 3-2 2-1 10 01 12 23 34 45 56 6
x
y
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
file =XY_Plot_0211.xls
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[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt27
Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph yy = | = |xx+2|+3+2|+3
Step-1 32 xxf 32 xy
3;2 :Xlators yx xy Step-2
Step-3 → T-table in x’y’
x y Ordered Pair yx ,
1 1 1,1
0 0 0,0
1 1 1,1
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph yy = | = |xx+2|+3+2|+3 Step-4: the x’y’-plane origin is 2 units
LEFT and 3 units UP from xy-plane
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
file =XY_Plot_0211.xls
y
x
x
Up 3
Left 2
y
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph yy = | = |xx+2|+3+2|+3
Step-5: Remember that the graph of y = |x| is V-Shaped:
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
Xlate_ABS_Graphs_1010.xls
yyy
x
x
Up 3
Left 2
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Bruce Mayer, PE Chabot College Mathematics
Rational Function TranslationRational Function Translation
A rational function is a function f that is a quotient of two polynomials, that is,
Where• where p(x) and q(x) are polynomials and
where q(x) is not the zero polynomial.
• The domain of f consists of all inputs x for which q(x) ≠ 0.
( )( ) ,
( )
p xf x
q x
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Bruce Mayer, PE Chabot College Mathematics
Example Example Find the DOMAIN
and GRAPH for f(x) SOLUTION
When the denom x = 0, we have x = 0, so the only input that results in a denominator of 0 is 0. Thus the domain {x|x 0} or (–, 0) (0, )
Construct T-table
x
xf1
x y = f(x)
-8 -1/8-4 -1/4-2 -1/2-1 -1
-1/2 -2-1/4 -4-1/8 -81/8 81/4 41/2 21 12 1/24 1/48 1/8
Next Plot points & connect Dots
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Bruce Mayer, PE Chabot College Mathematics
Plot Plot x
xf1
-10
-8
-6
-4
-2
0
2
4
6
8
10
-10 -8 -6 -4 -2 0 2 4 6 8 10
M55_§JBerland_Graphs_0806.xls
x
y Note that the Plot
approaches, but never touches, • the y-axis (as x ≠ 0)
– In other words the graph approaches the LINE x = 0
• the x-axis (as 1/ 0)– In other words the graph
approaches the LINE y = 0
A line that is approached by a graph is called an ASYMPTOTE
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Bruce Mayer, PE Chabot College Mathematics
ReCall Asymptotic BehaviorReCall Asymptotic Behavior
The graph of a rational function never crosses a vertical asymptote
The graph of a rational function might cross a horizontal asymptote but does not necessarily do so
Page 34
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Bruce Mayer, PE Chabot College Mathematics
Recall Vertical TranslationRecall Vertical Translation Given the graph of the equation
y = f(x), and c > 0, the graph of y = f(x) + c
is the graph of y = f(x) shifted UP (vertically) c units;
the graph of y = f(x) – c is the graph of y = f(x) shifted DOWN (vertically) c units
y = 3x2
y = 3x2−3
y = 3x2+2
Page 35
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt35
Bruce Mayer, PE Chabot College Mathematics
Recall Horizontal TranslationRecall Horizontal Translation Given the graph of the equation
y = f(x), and c > 0, the graph of y = f(x– c)
is the graph of y = f(x) shifted RIGHT (Horizontally) c units;
the graph of y = f(x + c) is the graph of y = f(x) shifted LEFT (Horizontally) c units.
y = 3x2
y = 3(x-2)2
y = 3(x+2)2
Page 36
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt36
Bruce Mayer, PE Chabot College Mathematics
ReCall Graphing by TranslationReCall Graphing by Translation
1. Let y = f(x)
2. Remove the translators to form an x’y’ eqn
3. Find ordered pair solutions of the x’y’ eqn
4. Use the translation rules to find the origin of the x’y’-plane. Draw the dashed x’ and y’ axes through the translated origin.
5. Plot the ordered pairs of the x’y’ equation on the x’y’-plane, and use the points to draw an appropriate graph.
Page 37
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt37
Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph
Step-1
Step-2
Step-3 → T-table in x’y’
12
1
xxf
12
1
xxf 1
2
1
xy
12
1
xy 2
11
xy
xy
1
x ' y ' x ' y '
-4 -1/4 1/4 4-2 -1/2 1/2 2-1 -1 1 1
-1/2 -2 2 1/2-1/4 -4 4 1/4
Page 38
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt38
Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Step-4: The
origin of the x’y’ -plane is 2 units left and 1 unit up from the origin of the xy-plane:
12
1
xxf
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
M55_§JBerland_Graphs_0806.xls
x
yy
x
Page 39
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt39
Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Step-5: We know
that the basic shape of this graph is Hyperbolic. Thus we can sketch the graph using Fewer Points on the translated axis using the T-Table
12
1
xxf
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
M55_§JBerland_Graphs_0806.xls
x
yy
x
Page 40
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt40
Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Examination of
the Graph reveals• Domain →
{x|x ≠ −2}
• Range →{y|y ≠ 1}
12
1
xxf
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
M55_§JBerland_Graphs_0806.xls
x
yy
x
Page 41
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt41
Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph
Step-1
Step-2
Step-3 → T-table in (x’y’) by y’ = −2/x’
13
2
xxg
3
21
xy
xy
2
13
2
xxg
13
2
xy
13
2
xy
x ' y ' x ' y '
-4 1/2 1/4 -8-2 1 1/2 -4-1 2 1 -2
-1/2 4 2 -1-1/4 8 4 -1/2
Page 42
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Step-4: The
origin of the x’y’ -plane is 3 units RIGHT and 1 unit DOWN from the origin of the xy-plane
13
2
xxg
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
-3 -2 -1 0 1 2 3 4 5 6 7 8 9
M55_§JBerland_Graphs_0806.xls
x
y y
x
Page 43
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt43
Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Step-5: We know
that the basic shape of this graph is Hyperbolic. Thus we can sketch the graph using Fewer Points on the translated axis using the T-Table
13
2
xxg
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
-3 -2 -1 0 1 2 3 4 5 6 7 8 9
M55_§JBerland_Graphs_0806.xls
x
y y
x
Page 44
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt44
Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Notice for this
Graph that the Hyperbola is• “mirrored”, or
rotated 90°, by the leading Negative sign
• “Spread out”, or expanded, by the 2 in the numerator
13
2
xxg
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
-3 -2 -1 0 1 2 3 4 5 6 7 8 9
M55_§JBerland_Graphs_0806.xls
x
y y
x
Page 45
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Examination
of the Graph reveals• Domain →
{x|x ≠ 3}
• Range →{y|y ≠ −1}
13
2
xxg
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
-3 -2 -1 0 1 2 3 4 5 6 7 8 9
M55_§JBerland_Graphs_0806.xls
x
y y
x
Page 46
[email protected] • MTH55_Lec-28_sec_Jb_Graph_Rational_Functions.ppt46
Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph
Step-1
Step-2
Step-3 → T-table in x’y’ by y’ = −1/(2x’)
212
1
xxh
xy
2
1
212
1
xxh 2
12
1
xy
212
1
xy 12
12
xy
x ' y ' x ' y '
-4 1/8 1/4 -2-2 1/4 1/2 -1-1 1/2 1 -1/2
-1/2 1 2 -1/4-1/4 2 4 -1/8
Page 47
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Step-4: The
origin of the x’y’ -plane is 1 unit RIGHT and 2 units UP from the origin of the xy-plane
212
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Step-5: We know
that the basic shape of this graph is Hyperbolic. Thus we can sketch the graph using Fewer Points on the translated axis using the T-Table
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Notice for this
Graph that the Hyperbola is• “mirrored”, or
rotated 90°, by the leading Negative sign
• “Pulled in”, or contracted, by the 2 in the Denominator
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph Examination
of the Graph reveals• Domain →
{x|x ≠ 1}
• Range →{y|y ≠ 2}
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Bruce Mayer, PE Chabot College Mathematics
WhiteBoard WorkWhiteBoard Work
Problems From §G1 Exercise Set• G8, G10, G12
A Function with TWO Vertical Asymptotes
2
3( ) .
2 5 3
xf x
x x
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Bruce Mayer, PE Chabot College Mathematics
All Done for TodayAll Done for Today
AnotherCool Design
byAsymptote
Architecture
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Bruce Mayer, PE Chabot College Mathematics
Bruce Mayer, PELicensed Electrical & Mechanical Engineer
[email protected]
Chabot Mathematics
AppendiAppendixx
–
srsrsr 22
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Bruce Mayer, PE Chabot College Mathematics
Translate Up or DownTranslate Up or Down
Make Graphs for
Notice: 5
3
xfxh
xfxg
f (x) x , g(x) x 3 and h(x) x 5
• Of the form of VERTICAL Translations
f (x) x
g(x) x 3
h(x) x 5
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Bruce Mayer, PE Chabot College Mathematics
Translate Left or RightTranslate Left or Right
Make Graphs for
f (x) x , g(x) x 3 and h(x) x 5
Notice: 53 xfxhxfxg
f (x) x
g(x) x 3
h(x) x 5
• Of the form of HORIZONTAL Translations
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph yy = | = |xx+2|+3+2|+3
Step-4: The origin of the x’y’ -plane is 2 units LEFT and 3 units UP from the origin of the xy-plane:
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Bruce Mayer, PE Chabot College Mathematics
Example Example Graph Graph yy = | = |xx+2|+3+2|+3
Step-5: Remember that the graph of y = |x| is V-Shaped:
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Bruce Mayer, PE Chabot College Mathematics
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file =XY_Plot_0211.xls
yy
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Over 2
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Bruce Mayer, PE Chabot College Mathematics
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Xlate_ABS_Graphs_1010.xls
yyy
x
Up 3
Over 2
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Bruce Mayer, PE Chabot College Mathematics
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Xlate_ABS_Graphs_1010.xls
x
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x
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Bruce Mayer, PE Chabot College Mathematics
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Xlate_ABS_Graphs_1010.xls
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y