Question 906667
Given Line, 20x+4y=41


Perpendicular Line, 4x-20y=c


The line must contain point  (0,-8).
{{{c=4x-20y}}}
{{{c=4*0-20(-8)}}}
{{{c=160}}}


The perpendicular line is {{{4x-20y=160}}},
{{{highlight(x-5y=40)}}}