Question

A gym charges $40 per month after an initial service fee. One member paid a total of $255 after 6 months. Find the equation that gives the total cost y of a gym membership for x months.

y =
x +

Answer 1

Let the initial fee be F. Then y = F + 40x.
Using 6 months: F + 40(6) = 255 → F + 240 = 255 → F = 15.

So y = 40x + 15 (or y = 15 + 40x).