Find the Slope of the Line That Passes Through the Given

Find the slope of the line that passes through the given points, if possible. (- 9, - 2) , (- 9, - 6)

A) $- \frac { 1 } { 6 }$
B) 9
C) 0
D) $\frac { 1 } { 2 }$
E) undefined