Which formula represents an arithmetic sequence in which the first term is 9 and fourth term is 24? A. a (n) = 5n +9
B. a(n) = 5n +4
C. a(n) = -5n+ 29
D. a(n) - 15n - 6

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.