A cell phone plan costs $200 to start. Then there is a $50 charge each
month. 1. What is the total cost (start-up fee and monthly charge) to use
the cell phone for 1 month? 2. What is the total cost for x months? 3. Graph
the cost of the cell phone plan over a period of two years, using months as
the unit of time. Be sure to label your axes and scale them by labeling each
gridline with a number. 4. Is there a proportional relationship between
time and the cost of the cell phone plan? Explain how you know