Cell Phone Plans: A: A cell phone provider offers a plan that costs $40 per month plus
$.20 per text message sent or received.

B: A comparable plan costs $60 per month but
offers unlimited text messaging.

a. How many text messages would you have to send or receive in order for the
plans to cost the same each month?

b. If you send or receive an average of 50 text messages each month, which plan
would you choose? Why?

A: Set of messages

Plan A or B?