For brainlist Johnny and Maddox joined different gyms. The cost of joining the gym was $30 and then he must pay $15 per month. Johnny joined Gym A and his membership can be modeled by the following equation where x represents the number of months in which he has been a member and f(x) equals the total cost of he has paid for his membership. f (x) = 15x + 30 - Maddox joined Gym B and his membership is modeled in the following table. Part A: Determine who paid a higher joining fee for the gym membership. Explain. Part B: Which person pays a higher monthly rate? Explain how you know.