Revisiting Proportional Relationships

A graph of a proportional relationship has three important characteristics. Two are listed, what is the third?

1. Forms a straight line

2. The unit rate is at point (1, r)

3. ?

• The line is curved

• The line goes through the origin at (0,0)

• The line will have unit rate and a ratio

Tags

CCSS.7.RP.A.2D

What is the unit rate as a ratio?

• 1 gallon :1 min

• 5 gallons : 1 min

• 10 gallons : 1 min

Tags

CCSS.6.RP.A.3B

Tickets to a movie are $15 for adult and $7.50 for children. What is an child ticket written as a ratio?

• $7.50:1

• $15:1

• $15:7.50

• $22.50

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

The graph represents a proportional relationship. Write the equation for this relationship?

• y = 2x

• y = 30x

• y = 15x

• y = 0.5x

Tags

CCSS.7.RP.A.2C

Cotton Candy is for sale and the prices are below. Does the Cotton Candy form a proportional relationship?

2 oz bag : $9.50

6 oz bag: $28.50

8 oz bag: $38.00

• Yes, because the unit rate IS all the same

• No, because the unit rate is NOT all the same

Tags

CCSS.7.RP.A.2A

Tonya earns money working. Her money made can be represented by the equation m = $14.50x, where m is the total money earned and x is the number of hours worked. What is the constant of proportionality?

• $15

• $14.50

• $29.00

Tags

CCSS.7.RP.A.2B

Ice cream sales are shown below. If the relationship is proportional, write an equation.

3 oz is $4.50

5 oz is $7.50

8 oz is $12.00

• y = 1.5x

• y = 4/3x

• the relationship is NOT proportional, therefore there is no equation

Tags

CCSS.7.RP.A.2C

The table shows the ratio of the number of apples to number of trees. What is the constant of proportionality?

• 1/4

• 52

• 13

• none

Tags

CCSS.7.RP.A.2B

Every female rabbit has 7 baby rabbits. What is the constant of proportionality for the ratio of baby rabbits to female rabbits

• 1/7

• 7

• 3

• 7/3

Tags

CCSS.7.RP.A.2B

What is the constant of proportionality in the graph?

• 20

• 1/20

• 1

• 40

Tags

CCSS.7.RP.A.2B