Proportional or Not?
From Tables
From Equations
From Graphs
Word Problems
100
Does the table represent a proportional relationship or not? Be able to explain your answer.
Not Proportional, when dividing y/x they do not all equal the same constant of proportionality.
100
What is the constant of proportionality?
45
100
What is the constant of proportionality?
y=0.6x
0.6
100
The ordered pair on a graph of a proportional relationship is (5, 15). What is the constant of proportionality?
3
100
Peter sells shoes. On Monday he sold 15 shoes in 5 hours. On Tuesday he sold 18 shoes in 6 hours. How many shoes does Peter sell in an hour?
3 shoes per hour
200
Does the table represent a proportional relationship? Be able to explain your answer.
Yes, all equal the same constant of proportionality.
200
Write an equation that shows the proportional relationship.
y =12x
200
The community center provides tutoring for students. The cost of tutoring is $18 per session. Write equation to model the total cost (C), after (s) sessions.
A) c=18s
B) c= 18 + s
C) c= s - 18
D) s= 18c
A
200
What is the constant of proportionality?
5
200
David is making his own strawberry yogurt. He uses 4 cups of milk for every 14 strawberries. Write an equation that represents the situation.
y=3.5x
300
Does the graph represent a proportional relationship? Be able to explain your answer.
Yes, it goes through the origin and is a linear line.
300
How much would it cost for 12 adults to go to the amusement park?
$900
300
What is the unit rate earned if the total pay is $186 for 24 hours?
$7.75 per hour
300
Write and equation that represents the relationship.
y=5x
300
(Hint: LW is the area formula for a rectangle. Use area to help you find your answer.)
A
400
Which equation represents the proportional relationship?
x 2 5 8 10
y 12 30 48 60
A. y=-3x + 4 C. y=x
B. y= 6x D. y=100x
B
400
$2.49
400
What is the constant of propotionality in the equation: y= 5x + 9
5
400
How many feet per minute does a sloth move?
6
400
m = 1.5c
Kaylee is selling lemonade. This is the formula she will use for relating the money she hopes to make (m) to the cups (c) she will sell.
a.) How much is she selling each cup for?
b.) What would she use this formula to figure out?
a.) $1.50
b.) How much money she will make if she knows the number of cups.
500
Write any two ratios that are proportional and be prepared to explain how do you know.
Answers may vary.
500
Write an equation with a coefficient that is a multiple of 4.
Answers may vary.
500
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500
A local specialty store sells two brands of yogurt. Brand A comes in a 12-ounce container for $2.88. Brand B comes in a 16-ounce container for $4.48.
What is the difference in cost per ounce between the two brands of yogurt?
4 cents per pound