The Art Club is selling calendars to raise money to paint a mural. The cost of printing 3 calendars is $642.75, and for 5 calendars the cost is $651.25. Write an equation in slope-intercept form that represents the total cost, T, of printing the calendars, c.
a. T=630c+4.25
b. T=630c-4.25
c. T=4.25c+630
d. T=4.25c-630