Evaluate the Given Function $f ( x ) = \left( \frac { 1 } { 5 } \right) ^ { x } , f ( - 3 )$

Multiple Choice

Evaluate the given function.
- $f ( x ) = \left( \frac { 1 } { 5 } \right) ^ { x } , f ( - 3 )$

A) $\frac { 1 } { 125 }$
B) $- 15$
C) $- \frac { 1 } { 125 }$
D) 125