Find the Coordinates of the Vertex for the Parabola Defined $$f ( x ) = x ^ { 2 } - 9$$

Multiple Choice

Find the coordinates of the vertex for the parabola defined by the given quadratic function.
- $$f ( x ) = x ^ { 2 } - 9$$

A) $( 0 , - 9 )$
B) $( 1,0 )$
C) $( 0,9 )$
D) $( 9,0 )$