Determine Where the Function Is Increasing and Where It Is $$f ( x ) = - 2 x ^ { 2 } - 2 x - 9$$

Multiple Choice

Determine where the function is increasing and where it is decreasing.
- $$f ( x ) = - 2 x ^ { 2 } - 2 x - 9$$

A) decreasing on $\left( - \infty , - \frac { 1 } { 2 } \right)$
increasing on $\left( - \frac { 1 } { 2 } , \infty \right)$
B) increasing on $\left( - \frac { 1 } { 2 } ,\infty , \right)$
decreasing on $\left( -\frac { 1 } { 2 } , \infty \right)$
C) increasing on $\left( - \infty , \frac { 1 } { 2 } \right)$
decreasing on $\left( \frac { 1 } { 2 } , \infty \right)$
D) increasing on $\left( - \infty , - \frac { 17 } { 2 } \right)$
decreasing on $\left( - \frac { 17 } { 2 } , \infty \right)$