Proportional and Nonproportional Linear Relationships

Does the equation show a proportional relationship?

• Yes

• No

Which statement cannot be true of the graph of a proportional relationship?

• It is not linear (straight)

• It is linear

• It includes the origin

• It shows a constant rate of change

Steve started with #250 and spent $25 per week. Chelsea started with $30 and saved $30 per week. Which equations represent these situations?

• y = 250 - $25x

• y = 30 + 30x

• y = 250x + 25

• y = 30x - 30

Find the Unit Rate.
405 rotations in 5 minutes   

• 81 rotations per minute

• 73 rotations per minute

• 18 rotations per minute

• 810 rotations in 10 minutes

The number of trees and the number of apples are given in the table above.  Determine which statement below is correct.

• The table is not proportional because the unit rate is not constant.

• The table is proportional and the unit rate is 1/13

• The table is proportional and the unit rate is 13.

• The table is not proportional because it doesn't pass through the origin.

A graph needs to go through _____ to be proportional.

• The origin

• The y-intercept

• The y-axis

• The x-axis

A graph needs to be a straight line and goes through _____ to be proportional.

• The origin

• The y-intercept

• The y-axis

• The x-axis

What is the slope?

• 5

• 15

• 10

What is the y-intercept?

• 1/2

• 2

• 7

• 3

Write the equation of the line.

• y = -2/3x + 4

• y = 2/3x + 4

• y = 3/2x + 4

• y = -3/2x + 4