Week 14 CAPT Problem - 9th Grade


The Telephone Plans


The phone company is offering three plans for its customers to choose from for local calls :

Plan A : $10.95 per month plus 10 cents per local call

Plan B : $8.75 per month plus 15 cents per local call

Plan C : $18.50 per month with unlimited free local calls

  1. What is the cost of Plan A for 55 local calls?

  2. Write an equation for the Cost (C) of local phone service in a given month for Plan B in terms of the number (N) of local calls.

  3. How much is it for 20 local calls for Plan A?

  4. How much is it for 20 calls with Plan B?

  5. At how many calls does Plan B become more expensive than Plan A?

  6. Make a graph for Plan A with the X Axis having the number of calls and the Y axis having the cost.