Find the Vertex of the Graph of the Quadratic Function $f ( x ) = - x ^ { 2 } + x - 4$

Multiple Choice

Find the vertex of the graph of the quadratic function.
- $f ( x ) = - x ^ { 2 } + x - 4$

A) $( 1 , - 4 )$
B) $( - 1 , - 6 )$
C) $\left( - \frac { 1 } { 2 } , - \frac { 19 } { 4 } \right)$
D) $\left( \frac { 1 } { 2 } , - \frac { 15 } { 4 } \right)$