Determine Whether Lines $L _ { 1 }$ And $L _ { 2 }$

Multiple Choice

Determine whether lines $L _ { 1 }$ and $L _ { 2 }$ passing through the pairs of points are parallel, perpendicular, or neither.
$$\begin{array} { l } L _ { 1 } : ( 7 , - 4 ) , ( - 9 , - 1 ) \\L _ { 2 } : ( 4 , - 6 ) , ( - 3,9 ) \end{array}$$

A) parallel
B) perpendicular
C) neither