15) For your birthday next year, you decide to start looking into getting a new cellphone. You do a lot of research on which plan will be best for you. You decide to pick the plan that has an initial fee of $275 and a monthly fee of $18.50.
a) Write an equation in slope-intercept form to model this situation.
b) What does the slope mean in this problem?
c) What does the y-intercept mean in this problem?