Determine the Function Value $f ( x ) = \log _ { a } x$

Multiple Choice

Determine the function value.
-Suppose $f ( x ) = \log _ { a } x$ and $f ( 5 ) = 2$ . Find $f \left( \frac { 1 } { 25 } \right)$

A) $\frac { 1 } { 2 }$
B) 4
C) $- 2$
D) $- 4$