Is it Proportional?
Constant of Proportionality
Equation
Problem Solving
100
Is it proportional? 
Yes
100
What is the constant of proportionality in the following:
y=4.5x
4.5
100
Write the equation for the following: 
y=0.2x
100
Four movie tickets cost $30. Five concert tickets cost $36.50. Does the concert or movie ticket cost less? How much less?
Concert, $0.20
200
Does the graph show a proportional relationship?
No
200
What is the constant of proportionality in the following:
y=7x
7
200
The points (14,7) and (1.5, 0.75) are on the graph of a proportion. What is the equation?
y=0.5x
200
Using the following, how many cookies can be made with 7 cups of flour? 
131 (131.25)
300
Is it proportional? 
No
300
What is the constant of proportionality in the following:
y=8.23x
8.23
300
Write the equation for the following: 
y=4/3x
300
Marco needs to buy some cat food. At the nearest store, 3 bags cost $15.75. How much would Marco spend on 5 bags of cat food?
$26.25
400
Does the table show a proportional relationship? 
Yes
400
The points (2,4) and (3,6) are on the graph of a proportional relationship. What is the constant of proportionality?
k=2
400
Is the following proportional? If so, what is the equation?
(15,60) (19,76) (23,92)
y=4x
400
A box of cereal states that there are 90 calories in a
3/4
cup serving. How many calories are there in 4 cups of cereal?
480 calories
500
Does the equation y=3x+5 show a proportional relationship?
No
500
Name the constant of proportionality. 
k=4/3
500
Is the following proportional? If so, what is the equation? 
Not proportional
500
A recipe calls for 15 oz of flour for every 8 oz of milk. If you use 15 oz of milk, how much flour should you use?
28 1/8 oz