A gym membership has a $50 joining fee plus charges $17 a month for m months

A gym membership has a $50 joining fee plus charges $17 a month for m months

Build a cost equation C(m) where m is the number of months of membership.
C(m) = Variable Cost * variable units + Fixed Cost
C(m) = Months of membership * m + Joining Fee

Plugging in our numbers and we get:
C(m) = 17m + 50