A cell phone plan costs $200 to start. Then there is a $50 charge each month. what is the total cost (start up fee and monthly charge) to use the cell phone plan for one month?
I got $250

Part B
what is the total cost for x months?

Part D
Is there a proportional relationship between time and cost of the cell phone plan? Explain how you know.

Part E

what is the start-up fee and monthly cost for this plan?​