Question

Write and equation of the line perpendicular to the given line that contains P

Answer 1

If slope of a line is m then slope of the perpendicular line is -1/m .
so slope of perpendicular line is -3.
then use this  y-y0=m(x-x0)
y+5=-3(x-2)
y+5=-3x+6
y=-3x+1