Question 43451
Perp to M = 5 is M = -1/5
{{{y - y1 = m(x - x1)}}}
{{{y - 9 = (-1/5)(x - 1)}}}
{{{y = -0.2x + 9.2)}}}
{{{ graph( 600, 600, -10, 10, -10, 10, -0.2x + 9.2) }}}