Use the Quadratic Function to Determine If the Function Has $$f ( x ) = x ^ { 2 } - 18 x + 87$$

Multiple Choice

Use the quadratic function to determine if the function has a maximum or minimum value and then find this maximum or minimum value.
- $$f ( x ) = x ^ { 2 } - 18 x + 87$$

A) minimum at $( 9,6 )$
B) maximum at $( 6,0 )$
C) maximum at $( 6,9 )$
D) minimum at $( 0,9 )$