Find the Vertex and Axis of Symmetry of the Graph $$f ( x ) = x ^ { 2 } - 6 x$$

Multiple Choice

Find the vertex and axis of symmetry of the graph of the function.
- $$f ( x ) = x ^ { 2 } - 6 x$$

A) (3, -9) ; x = 3
B) (9, -3) ; x = 9
C) (-9, 3) ; x = -9
D) (-3, 9) ; x = -3