6. The cost C of joining FitFast Gym includes an initial membership fee of $127, plus a monthly
fee, m, of $28.
a. The cost of going to the gym is a function of the number of months of membership. Find a
rule for the function.
b. Find the cost of using the gym for 9 months
The function rule would be f(m)=127+28m. This is because the membership fee, $127, is added to the monthly cost, which is given by 28×m, the number of months. The cost of gym membership for 9 months then would be f(9)=127+28(9)=127+252=$379.
