Question 377553
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Hi,
Using point-slope formula, {{{y - y[1] = m(x - x[1])}}}, equation of the line
to find the equation of a line with slope m and {{{P(x[1],y[1])}}} on the line. 
for ex if the slope m = -3 and point is Pt(1,1)
{{{y - y[1] = m(x - x[1])}}}
{{{y = m(x - x[1])+ y[1]}}}
y = -3(x-1) + 1
y = -3x + 3 + 1
y = -3x + 4
{{{drawing(300,300, -6, 6, -6, 6,
circle(1, 1,0.3),
graph( 300, 300, -6, 6, -6, 6,-3x +4))}}}