a bag of jelly beans contains 4/5 of a pound. if each serving contains 1/10 of a pound, how many servings of jelly beans are available

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.