Proportional and Nonproportional Functions

Which set of ordered pairs represent y as a function of x?

• A

• B

• C

• D

Which mapping diagram does NOT show y as a function of x?

• A

• B

• C

• D

Mark has 15 toys in his toy box. He adds 2 new toys each month. Which statement below is true?

• This represents a proportional situation because Mark now has 17 toys in his toy box.

• This represents a non proportional situation because Mark began with 15 toys in his toy box.

• This represents a proportional situation because Mark is adding 2 new toys each month.

• This represents a non proportional situation because Mark began with 2 toys in his toy box.

Which statement represents a proportional situation?

• Gabriel drove 85 miles per day for four days.

• Gabriel drove 60 miles on day one. He then drove 85 miles per day for four days.

• Gabriel drove 60 miles on day one and 85 miles on day two.

• Gabriel drove 85 miles on day one and day two. He then drove 60 miles per day for four days.

Is the graph proportional or nonproportional?

• proportional

• non proportional

Does the table represent a proportional relationship?

• Yes.

• No.

Does the equation show a proportional relationship?

• Yes

• No

Does the equation show a proportional relationship?

• Yes

• No

Mama Mia’s Pizza sells medium pizza for $7 each and charges a $2 delivery fee per order. Which describes this relationship?

• a non-proportional function with a y-intercept of 2

• a non-proportional function with a y-intercept of 7

• a proportional function with a y-intercept of 2

• a proportional function with a y-intercept of 7 

Is this mapping a function or not a function? 

• Function

• Not a Function