Find an Equation for the Inverse Function $$f ( x ) = 8 ^ { x } - 3$$

Multiple Choice

Find an equation for the inverse function.
- $$f ( x ) = 8 ^ { x } - 3$$

A) $f ^ { - 1 } ( x ) = \log _ { 3 } ( x - 8 )$
B) $f ^ { - 1 } ( x ) = \log _ { 8 } ( x ) + 3$
C) $f ^ { - 1 } ( x ) = \log _ { 8 } ( x - 3 )$
D) $f ^ { - 1 } ( x ) = \log _ { 8 } ( x + 3 )$