Which of the following tables represents a proportional relationship? A. x 1 2 3 4 y 2 4 6 8 B. x 1 2 3 5 y 2 4 6 8 C. x 1 3 5 7 y 2 4 6 8

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.