Determining if situations are proportional

Which relationship is an example of a proportional function?

• a rental company charges $80 per day and a one-time fee of $24
• a taxi ride costs $2 for the first mile and $4 for each additional mile
• a gym membership cost $30 per month and an additional annual registration fee of $75
• Beverly earns $210 a week for 4 weeks

Tags

CCSS.7.RP.A.2D

Describe the relationship in the table.

• nonproportional; negative rate of change
• nonproportional; positive rate of change
• proportional; negative rate of change
• proportional; positive rate of change

Tags

CCSS.7.RP.A.2D

Proportional or Non-Proportional:
The video game rental fee is $15 plus $3 per day. 

• Proportional
• Non-Proportional

Tags

CCSS.7.RP.A.2A

Ellory bought a new surfboard.  She made an initial payment of $100 to the store, and she will pay $10 each month until the board is paid off.  Which equation represents the relationship between m, the number of monthly payments Ellory has made, and t, the total amount that Ellory has paid the store?

• t = 100m + 10
• t = 10m - 100
• t = 100m - 10
• t = 10m + 100

Tags

CCSS.HSF-BF.A.1A

Stella got a new internet plan.  The company charges her $0.15 for each minute plus a monthly fee of $40.  What equation would be used to calculate how much the cost is for her new internet plan?

• y=0.15x-40
• y=0.15x+40
• y=0.15-40x
• y=0.15+40x

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Which equation does not show a proportional relationship?

• y = 5x - 2x
• y = 2x
• y = -0.4x - 3
• y = 5x + 5x

Tags

CCSS.7.RP.A.2D