Parallel and Perpendicular Lines

 $-\frac{3}{2}$  

 $-\frac{2}{3}$  

 $\frac{2}{3}$  

 $\frac{3}{2}$  

 $-3$  

 $3$  

 $-2$  

 $2$  

 $y=\frac{1}{4\ }x+12.25$  

 $y=\frac{1}{4}x-12.25$  

 $y=\frac{1}{4\ }x-4$  

 $y=\frac{1}{4}x+4$  

 $y=-5x+11$  

 $y=-5x-11$  

 $y=-5x-31$  

 $y=-5x+31$  

 $-\frac{3}{2}$  

 $-\frac{2}{3}$  

 $\frac{2}{3}$  

 $\frac{3}{2}$  

 $-3$  

 $3$  

 $-\frac{1}{3}$  

 $\frac{1}{3}$  

 $y=-4x+47$  

 $y=-4x-47$  

 $y=\frac{1}{4\ }x-4$  

 $y=\frac{1}{4}x+4$  

 $y=-5x+11$  

 $y=-5x-11$  

 $y=\frac{1}{5}x-4$  

 $y=\frac{1}{5}x+4$  

Undefined

Zero

$y=\ -2$

$y=2$

$x=2$

$x=-2$

Undefined

Zero

 $y=\ -1$ 

 $y=1$ 

 $x=1$ 

 $x=-1$ 

Horizontal line, slope of zero

Horizontal line, undefined slope

Vertical line, slope of zero

vertical line, undefined slope

Horizontal line, slope of zero

Horizontal line, undefined slope

Vertical line, slope of zero

vertical line, undefined slope

Horizontal line, slope of zero

Horizontal line, undefined slope

Vertical line, slope of zero

vertical line, undefined slope

Horizontal line, slope of zero

Horizontal line, undefined slope

Vertical line, slope of zero

vertical line, undefined slope