Find the Vertex of the Parabola $$f ( x ) = - \frac { 1 } { 3 } x ^ { 2 } + 9 x - 3$$

Multiple Choice

Find the vertex of the parabola.
- $$f ( x ) = - \frac { 1 } { 3 } x ^ { 2 } + 9 x - 3$$

A) $( 27 , - 3 )$
B) $\left( \frac { 27 } { 2 } , \frac { 231 } { 4 } \right)$
C) $( - 27 , - 489 )$
D) $\left( - \frac { 27 } { 2 } , - \frac { 741 } { 4 } \right)$