The Function F Is One-To-One $$f ( x ) = 3 x + 4$$

Multiple Choice

The function f is one-to-one. Find its inverse.
- $$f ( x ) = 3 x + 4$$

A) $f ^ { - 1 } ( x ) = \frac { x + 4 } { 3 }$
B) $f ^ { - 1 } ( x ) = \frac { x - 4 } { 3 }$
C) $f ^ { - 1 } ( x ) = \frac { x } { 3 } + 4$
D) $f ^ { - 1 } ( x ) = \frac { x } { 3 } - 4$