Values for the function f(x) are shown in the table. х
0
1
2.
3
4
5
f(x)
1
3
9
27
81
243
Which statement proves that f(x) is an exponential function?
O All of the values of f(z) are odd numbers.
All of the values of f(x) are multiples of 3.
The function f(x) grows by equal factors over equal intervals.
The function f(x) grows by equal differences over equal intervals.