Function F Is $$f ( x ) = \left\{ \begin{array} { l l } - 6 & \text { if } 0 \leq x < 9 \\- 6 x & \text { if } 9 \leq x < 18\end{array} \right.$$

Function f is $$f ( x ) = \left\{ \begin{array} { l l } - 6 & \text { if } 0 \leq x < 9 \\- 6 x & \text { if } 9 \leq x < 18\end{array} \right.$$
Find $f ( 3 )$ .

A) -18
B) -6
C) 18
D) 9