The Function F Is One-To-One $$f ( x ) = 2 x$$

Multiple Choice

The function f is one-to-one. Find its inverse.
- $$f ( x ) = 2 x$$

A) $f ^ { - 1 } ( x ) = - 2 x$
B) $f ^ { - 1 } ( x ) = \frac { x } { 2 }$
C) $f ^ { - 1 } ( x ) = \frac { 2 } { x }$
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = 2 \mathrm { x }$