There are a total of 127 cars and trucks on a lot. if there are four more than twice the number of trucks than cars, how many cars are on the lot

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.