Let’s Review Let’s Review 2.5B Create an Equation, Table and Graph
Feb 22, 2016
Let’s ReviewLet’s Review
2.5B Create an Equation, Table and Graph
In this lesson you will create an equation, table, and graph
from a verbal representation
Let’s ReviewLet’s Review
Slope-intercept form:y = mx + b
Slope(rate of change)
y-intercept(initial value)
y = -1.5x + 2
Let’s Review
Let’s ReviewLet’s ReviewA linear function has a constant rate of change
(slope) and an initial value (y-intercept).
y = 3x + 2
x y0 21 52 83 11
5 – 23
1 – 01
31
Let’s Review
Let’s ReviewCore Lesson
A wild animal park opens with 100 antelope and the population grows
by 5 antelope every year.y-interceptSlope
y = 100 + 5x
Example1:Create an equation, table, and graph from a verbal representation
Let’s ReviewCore Lesson
x (years) y (antelope)
0 1001 1052 1103 115
Y-intercept
51105 - 1001 – 0
y = + x100Slope = 5 1 =5 5
Example 1- continuedConstruct (write) a numeric representation from the verbal representation.
Let’s ReviewCore Lesson
Slope = 5y-intercept
y = + x 100
5
102
102
Example 1 continuedConstruct (write) a algebraic function from the graphic representation.
Example 2:Create an equation, table, and graph from a verbal representation.
Joan’s aunt agreed to loan Joan $500 to buy a used car as long as Joan pays back $50 per month.
Let’s ReviewCore LessonJoan’s Aunt agrees to loan Joan $500 to
buy a used car as long as Joan pays back $50
per month.
Slope “indicator”
slope = 50y-intercept = -500
y = 50x - 500
Let’s ReviewCore Lesson
x (months)
y (remaining debt)
0 -500
Joan’s Aunt agrees to loan Joan $500 to buy a used car as long as Joan pays
back $50 per month.
1 -4502 -4003 -350
-450 - -5001 - 0
y-intercept
50=
=1
slope
Let’s ReviewCore LessonJoan’s Aunt agrees to loan Joan $500 to buy a used car as long as Joan pays back $50 per month.
Let’s ReviewGuided PracticePractice Example 1:Linda begins the year with $200 in her bank account. Each month, she deposits $50. Create an equation, table, and graph from this verbal representation .
Let’s ReviewExtension ActivitiesPractice Example 2:A parachutist is 500 feet above the ground. After she opens her parachute, she falls at a constant rate of 25 feet per second.
Create the equation, table, and graph for the scenario.
Let’s ReviewGuided PracticePractice Example 3:Construct an algebraic equation using the graph provided below.
5
25
Let’s ReviewExtension Activities
Homework: Problems 1-9
Let’s ReviewExtension ActivitiesHomework Problem 1:Construct an algebraic equation for each of the given representations.
x y0 -115 -41
15 -10130 -191
Multiply x by 0.6 and add 7
a b
c
10
50
Let’s ReviewExtension ActivitiesHomework Problem 2:Write an algebraic equation for this scenario. Make a table to help before you write it.
Parking Lot Prices
Each hour . . . $1.50 Entrance fee . . . $3.00
Let’s ReviewQuick QuizHomework Problem 3
Jordan’s movie rental company charges a monthly fee of $5.00 plus an additional cost of $1.25 per movie rental. Which of these equations represents the total monthly cost (c) of renting (x) movies?
a) C = 1.25x + 5.00 b) C = 3.75x + 5.00 c) C = 5.00x + 1.25 d) C = 5.00x + 3.75
Let’s ReviewQuick Quiz
Homework Problem 4:Which is the graph of y = -3x + 5 ?
a
b
c
d
Let’s ReviewExtension ActivitiesHomework Problem 5
Match each equation to its table.y = -4x - 3 y = -3 + 4xy = -3x - 4
x y -4 8-2 2-1 -12 -10
x y -4 -19-2 -11-1 -72 5
x y -4 13-2 5-1 12 -11
Let’s ReviewQuick QuizHomework Problem 6
A restaurant charges $160 for a room and $10 per person for food and drinks. Which table is correct for this situation?
x y 0 $1503 $1806 $25010 $300
x y 0 $1603 $1706 $18010 $190
x y 1 $1603 $2106 $27010 $350
x y 0 $1603 $1906 $22010 $260
a b c d
Let’s ReviewQuick QuizHomework Problem 7 :
Another restaurant charges $150 for a room and $10 per person for food and drinks. Which is the correct graph?
a b c d
Let’s ReviewGuided PracticeHomework Problem 8:Thomas is 300 miles away from home. He drives 50 miles per hour.
Create an equation, table, and graph to represent this situation.
Let’s ReviewExtension ActivitiesHomework Problem 9: We had 15 inches of snow. It snowed at a rate of 5 inches per hour.
Create an equation, table, and graph for the scenario.