Find the Axis of the Graph of the Function $$f ( x ) = 3 x ^ { 2 } - 18 x + 28$$

Multiple Choice

Find the axis of the graph of the function.
- $$f ( x ) = 3 x ^ { 2 } - 18 x + 28$$

A) $x = 1$
B) $x = 3$
C) $x = - 2$
D) $x = 0$