Back to Recognize and represent proportional relationships between quantities — Problem 2 · Task Set 3

7.RP.A.2 Tutor Intake -- Recognizing and Representing Proportional Relationships

This short check helps your tutor see where to start. Work each problem on
your own, without a calculator. If you are not sure, give your best try --
every answer helps your tutor plan your first few sessions.

Grade 7·10 problems·~11 min·Common Core Math - Grade 7·standard·7-rp-a-2

Work through problems with immediate feedback

Concepts

A streaming service charges $8 per month plus $2 per movie
rented. Is the relationship between number of movies rented and
total monthly cost proportional?

No -- with 0 movies rented the cost is $8, not $0, so the ratio cost/movies is not constant and the graph would not pass through the origin.

Yes -- the cost increases by a constant $2 for every additional movie, so the relationship is proportional.

Yes -- because the relationship can be graphed as a straight line.

No -- because the numbers involve money, and proportional relationships cannot involve dollar amounts.