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

Multiple Choice

Determine the function value.
-Suppose $f ( x ) = \log _ { a } ( x )$ and $f ( 2 ) = 2$ . Find $f ( 8 )$ .

A) 3
B) 12
C) 6
D) $\sqrt { 2 }$