A gym charges each person a $15 enrollment fee and $3 per visit to the gym. The function
rule that represents the cost for each person to visit the gym is what?

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.