5. slope intercept form y=mx+b y= -8x²-9+433
use point slope formula y-y1=m (x-x1) to find the line perpendicular to y=-8x-9
y=1/8x-6
6. slope intercept form y=mx+b.
y=-1/3x²+x+4
use point slope formula y-y1=m (x-x1) to find the line perpendicular to y=-1/3x+1.
y=3x+7
two lines are perpendicular when they meet at a right angle. (90 degrees) perpendicular lines have opposite-reciprocal slopes. when one line has a slope of m a perpendicular line has a slope of -1/m
