On the first birthday of their son, parents deposit $529 in his new account on each subsequent birthday, the new deposit is increased by $63 what would the value of the deposit on his 21st birthday be?

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.