Find the Slope of the Line Through the Pair of Points

Multiple Choice

Find the slope of the line through the pair of points.
- $( - 3 , - 7 )$ and $( 2 , - 8 )$

A) 5
B) $\frac { 1 } { 5 }$
C) $- 5$
D) $- \frac { 1 } { 5 }$