Determine the Slope of the Line Passing Through the Given $( 1 , - 1 )$

Multiple Choice

Determine the slope of the line passing through the given points.
- $( 1 , - 1 )$ and $( - 8 , - 3 )$

A) $m = \frac { 9 } { 2 }$
B) $m = \frac { 2 } { 9 }$
C) $m = - \frac { 9 } { 2 }$
D) $m = - \frac { 2 } { 9 }$