Perpendicular Lines

$y=-\frac{1}{2}x+\frac{1}{2}$

$y=\frac{1}{2}x+2$

$y=-2x+7$

$y=-2x+8$

 $y=\frac{1}{3}x-9$ 

 $y=\frac{1}{3}x+10$ 

 $y=-3x+6$ 

 $y=-3x-8$ 

$y=\frac{1}{3}x$

$y=\frac{1}{3}x-2$

$y=-3x+8$

$y=\frac{1}{3}x+\frac{10}{3}$

 $=-\frac{5}{2}x-\frac{11}{2}$  

 $y=-\frac{5}{2}x+2$  

 $y=-\frac{5}{2}x+8$  

 $y=\frac{2}{5}x+\frac{19}{5}$   

$y=4x-2$

$y=-\frac{1}{4}x$

$y=-4x+1$

None are perpendicular.

opposite (sign) reciprocals.

opposites.

identical.

always 7.

 $5$  

 $-5$  

 $\frac{1}{5}$  

 $-\frac{1}{5}$  

 $y=-\frac{6}{7}x-2$  

 $y=\frac{6}{7}x+1$  

 $y=\frac{7}{6}x-8$  

 $y=-\frac{7}{6}x+12$