Berenice decides to look at a horizon unwired phone plan. The plan has a monthly charge and an activation fee. With this plan she can 10 months of service for 210$ and 15 months of service for 292.50$ 1.) Write a linear equation to represent the cost of the plan Let c represent the total amount of money paid in dollars, and m represent the number of months in service. Show work.
2.) use your equations find the cost for 24 months of service.