Name: SAT Math Help & School Math Mastery
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#34567

functions

exponential

medium

60 sec

For the exponential function $f$ , the value of $f (2)$ is $k$ , where $k$ is a constant. Which of the following equivalent forms of the function $f$ shows the value of $k$ as the coefficient?

A.

$f (x) = 5 (4)^{x}$

B.

$f (x) = 20 (4)^{x - 1}$

C.

$f (x) = 80 (4)^{x - 2}$

D.

$f (x) = 320 (4)^{x - 3}$