Question 255724
Use the point-slope form of a line with point (xp, yp) and slope m:
{{{y-yp=m(x-xp)}}}

{{{y-(-5)=-3(x-4)}}}
{{{y+5=-3x+12}}}
{{{y=-3x+7}}}
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{{{drawing( 300, 300, -6, 6, -6, 6,grid( 1 ),circle( 4, -5, .2 ), graph( 300, 300, -6, 6, -6, 6, -3x+7)) }}}