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Graphing
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Back in Caveman days, there was only
one way to measure where you were.
NUMBER LINE
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Theres Trogthe caveman. He usually
hunted around number6.
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Then he would go home, which
was at 0
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Nobody ever left the trail. You just
didntdo it!
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BUT..One day, Troggets crazy and
LEAVES the path!!
NOBODYever did this before!!!!
It was TOTALLY CRAZY!!
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Now Trog is lost. Hes not on the number
line. How do we tell where Trog is?
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Easy!! With TWO number lines!
One will measure sideways
The other will measure
up and down!!!
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Where is Trogfrom
his house?
Start Here
6 sideways,
5 up !
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These two number lines
put together is calledThe Coordinate Plane
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The line that measures
sideways is called
thex-axis.
SIDEWAYS = X
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The line that measures
up and down is called
The y-axis.
Upand
Dow
n=Y
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Where the lines meet is called the Origin
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Lets Practice.
Give the coordinates:(4,10)
(-2,2)
(-6,-4)
(4,-2)
(0,0)
a.k.a:THEO
RIGIN
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The COORDINATE PLANE used to show
how TWO THINGS ARE RELATED.
Lets see how Hours of Daily Sunlightaffects
How Tall Plants Grow:
2016129731.510PlantHeight
(inches)
1614121086420HoursSunlight
per day
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2016129731.510PlantHeight
(inches)
1614121086420Hours
Sunlightper day
This is the part YOU control.
Called theINDEPENDENT VARIABLE
This is what
CHANGESAS A RESULT.This shows WHAT HAPPENS
Called the DEPENDENT VARIABLE
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2016129731.510
Plant
Height
(inches)
1614121086420HoursSunlight
What happens here DEPENDS ON.
What you did here!!
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2016129731.510PlantHeight
(inches)
1614121086420HoursSunlight
All of the numbers from theINDEPENDENT VARIABLE
are known as theDOMAIN
All of the numbers of theDEPENDENT VARIABLE
are known as theRANGE
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2016129731.510Plant
Height(inches)
1614121086420HoursSunlight
Numbers in the DOMAIN
are graphed on theX-AXISNumbers in the RANGEAre graphed on the Y-AXIS
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2016129731.510PlantHeight
(inches)
1614121086420HoursSunlight X
Y
Each match up to form aCOORDINATE PAIR
that you can graph!
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2016129731.510PlantHeight
(inches)
1614121086420HoursSunlight X
Y
LETS GRAPH IT !!!!!!