The Function F Is One-To-One $$f ( x ) = \frac { 4 } { x }$$

Multiple Choice

The function f is one-to-one. Find its inverse.
- $$f ( x ) = \frac { 4 } { x }$$

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