Find the Inverse of the One-To-One Function $y = \frac { 1 } { 8 x }$

Multiple Choice

Find the inverse of the one-to-one function. $y = \frac { 1 } { 8 x }$

A) $f ^ { - 1 } ( x ) = \frac { 8 } { x }$
B) $f ^ { - 1 } ( x ) = \frac { x } { 8 }$
C) $f ^ { - 1 } ( x ) = 8 x$
D) $f ^ { - 1 } ( x ) = \frac { 1 } { 8 x }$
E) inverse does not exist