For the Given Function F(x), Find F-1(x) $$f ( x ) = - 2 x$$

Multiple Choice

For the given function f(x) , find f-1(x) .
- $$f ( x ) = - 2 x$$

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