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

Multiple Choice

Determine if lines $L _ { 1 }$ and $L _ { 2 }$ are parallel, perpendicular, or neither. $L _ { 1 } : 4 x - 4 y = - 4$ $L _ { 2 } : 8 x + 8 y = 9$

A) parallel
B) neither
C) perpendicular