Represent Proportional Relationships with Equations

Which of the following is an equation to represent this proportional relationship?

• y=15x

• x=15y

• y=3x

• x=3y

Use yoga classes as your x and cost as your y. Which equation represents this table?

• y=30x

• y=2x

• y=15x

• y=6x

• A

• B

• C

• D

The data in the table represents a proportional relationship. What equation would represent this data accurately?

Does this equation represent a proportional relationship?

• Yes

• No

Which equation shows a proportional relationship between x and y? (a)  

• y = 3x + 9

• y = 1/2x

• y = 1/2x - 2

• y = x2

A dolphin travels through the water of a speed of 25 kilometers per hour. Which representation shows the distance a dolphin can travel at this rate? (7.4A)

• 
• 
• 
• 

Maria makes $15 an hour babysitting.  What equation can be used to represent the amount of money she makes per hour?

• y = x + 15

• y = 15x

• y = 15/x

• y = 15 - x

An app developer projects that he will earn $230.00 for every 100 apps downloaded.

Which of the following equations can be used to represent the proportional relationship

between the number of apps, x, and the total earnings, y?

• A
• B
• C
• D