Question 185956
Could someone please help me find the equation of the line that goes through the points (-4,2) and (-3,-7). I am terrible at graphing and equations and in need of help. Thanks for your help in advance.
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1st find the slope of the line thru the points.
Slope, m, is diff in y/diff in x
m = (-7-2)/(-3-(-4))
m = -9/1
m = -9
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Then, use this formula.
y-y1 = m*(x-x1) where (x1,y1) is either point.
y-2 = -9*(x+4)
y-2 = -9x-36
y = -9x - 34
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That always works.  If you sub -4 for x, y = 2.  Same for the other point.