Find the Slope of the Curve at the Given Point $y = x ^ { 3 } - 9 x , P ( 1 , - 8 )$

Multiple Choice

Find the slope of the curve at the given point P and an equation of the tangent line at P.
- $y = x ^ { 3 } - 9 x , P ( 1 , - 8 )$

A) slope is $- 6 ; y = - 6 x$
B) slope is $3 ; y = 3 x - 11$
C) slope is $3 ; y = 3 x - 7$
D) slope is $- 6 ; y = - 6 x - 2$