Question 393817
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Hi
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  
line that has a slope of -5 (-5/1) and goes through the point (-4, 9)
 y - 9 = -5(x+4)
OR
 y = -5x -11
Note: as y increases/decreases by 5, x value changes by 1 in the other direction
{{{drawing(300,300, -10,10,-10,10,
 grid(1),
circle(-4, 9,0.4),
circle(-3, 4,0.4),
graph( 300, 300, -10,10,-10,10,-5x-11))}}}