Write an Equation of the Inverse for the One-To-One Function $$z ( x ) = \frac { 1 } { 5 } x - 2$$

Multiple Choice

Write an equation of the inverse for the one-to-one function as defined. $$z ( x ) = \frac { 1 } { 5 } x - 2$$

A) $z ^ { - 1 } ( x ) = x - 10$
B) $z ^ { - 1 } ( x ) = 5 ( x + 2 )$
C) $z ^ { - 1 } ( x ) = 5 x + 2$
D) $z ^ { - 1 } ( x ) = 5 x - \frac { 1 } { 2 }$