finding the equation to the perpendicular lines.
y=x+4; (-7,1)
perpendicula line slope= -1
y=-x+b and at -7,1
1=7+b or b=-6
equation of perpendcular then is y= -x-6
y=x+4; (-7,1)
y=-x+b and at -7,1
1=7+b or b=-6
equation of perpendcular then is y= -x-6