Find the Slope of the Curve at the Indicated Point $$y = x ^ { 2 } + 9 x , x = - 6$$

Find the slope of the curve at the indicated point.
- $$y = x ^ { 2 } + 9 x , x = - 6$$

A) m = -18
B) m = -3
C) m = -12
D) m = 3