1. determine if the function f (x)= 3^2x-3 is exponential. if it is exponential, determine the base, b, when the function is written in the form f (x)= ab^x.
a. the function is not exponential
b. the function is exponential with base b=3
c. the function is exponential with base b= 1/3.
d. the function is exponential with base b=9.

2. what is the end behavior for the graph of the exponential function f(x)= b^x when b > 1?
a. f (x)—> ∞ as x —> ∞; f (x)—> 0 as x —> -∞
b. f (x)—> 0 as x —> ∞; f (x) —> ∞ as x —> -∞
c. f (x)—> ∞ as x —> ∞; f(x) —> -∞ as x —> 0
d. f (x)—> ∞ as x —> 0; f(x) —> -∞ as x -> -∞
4. which statement describes a key difference between the graphs of f(x)= 5•e^x and f(x)= 5.5•e^x?
a. the graphs have different vertical stretches.
b. the graphs have different ranges.
c. the graphs have different horizontal asymptotes.
d. the graphs have different end behaviors.