Journal Problem-Solving # 3

1. Choosing a phone plan in a college dormitory,

each student has a choice of two phone

companies. Company A charges $7.46 per

month plus 13 cents a call and Company B

charges $6.17 per month plus 17 cents per call.

a. About how many phone calls do you make

per month?

b. For each company, write an equation which

represents the cost in a given month in terms

of the number of phone calls.

c. Graph each equation you wrote in part (b). Be

sure to label your graph.

d. When are the costs for both companies the

same? When is Company A a better choice?

When is Company B a better choice?

e. Decide which plan is best for which type of

user. Why?