A cell phone plan costs $200 to start. Then there is a $50 charge each month. a. Graph the cost of the cell phone plan over a period of two years, using months as the units of time (on your own paper). Is there a proportional relationship between time and the cost of the cell phone plan? Explain how you know.
b. Suppose you drew a line parallel to the line you graphed that goes through the point (0,350) and this line represented the pricing plan for another company. What is the startup fee and monthly cost for this plan?