Proportional Relationships with Equations

The graph below shows the relationship between the number of hours Cody works and the amount of money he earns at his job. Which of the following statements is NOT true about the relationship?

• The graph can be represented by y = 7.5x.

• If Cody has earned $120, he has worked 16 hours.

• If Cody works 20 hours, he will earn $160.

• The situation is a proportional relationship.

Which equation represents the linear relationship in the table?

• y = 1.3x + 10

• y = x + 10

• y = 3.3x + 10

• y = 1.3x

The graph shows the number of homework problems Amanda has remaining based on the number of minutes she has been working. Which of the following statements is NOT true?

• Amanda started with 30 homework questions.

• Amanda finishes 2 homework questions every 3 minutes.

• The graph shows the equation y = -3/2x + 30.

• The graph represents a non-proportional relationship.

Write an equation to represent the relationship shown in the table.

• y = 4x -7

• y = -4x + 7

• y = 4x + 7

• y = -4x - 7

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

Does this table represent a proportional relationship?

• Yes, the COP is 4

• Yes, the COP is 12

• No, there is no COP

• No, there is not enough information

What is the constant of proportionality?

• The unit rate of a given scenario

• What you find when you take y divided by x

• The number you multiply your x-value by to get your y-value

• All of the above

What is the constant of proportionality for this table?

• 1

• 6

• 3

• 12