Determine Whether the Function Has an Inverse Function $g ( x ) = \frac { x } { 5 }$

Multiple Choice

Determine whether the function has an inverse function.If it does,find the inverse function.? $g ( x ) = \frac { x } { 5 }$ ?

A) $g ^ { - 1 } ( x ) = - 5 x$
B) $g ^ { - 1 } ( x ) = 5 x$
C) $$g ^ { - 1 } ( x ) = \frac { 5 } { x }$$
D) $g ^ { - 1 } ( x ) = - \frac { x } { 5 }$
E) No inverse