For the Given Function F(x), Find F-1(x) $f ^ { - 1 } ( x ) = 8 x$

Multiple Choice

For the given function f(x) , find f-1(x) .
-f(x) = 8x

A) $f ^ { - 1 } ( x ) = 8 x$
B) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { 8 }$
C) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = 8 + \mathrm { x }$
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 8 } { \mathrm { x } }$