Question 256299
Use the point-slope form of a line with point (xp, yp) and slope m:
{{{y-yp=m(x-xp)}}}
{{{y-(-4)=-4(x-1)}}}
{{{y+4=-4x+4}}}
{{{y=-4x}}}
{{{drawing( 300, 300, -5, 5, -5, 5,grid( 1 ),circle( 1, -4, .2 ), graph( 300, 300, -5, 5, -5, 5, -4x)) }}}