Question 651585: If 2 points are given such as (-2,7) and (-8,-2), how do you find the y intercept. I know how to find the slope by doing x^2 - x^1/ y^2 - y^1, but I forgot how to find the y intercept.
So far, for this equation I have y=2/3x + what
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! If 2 points are given such as (-2,7) and (-8,-2), how do you find the y intercept. I know how to find the slope by doing x^2 - x^1/ y^2 - y^1, but I forgot how to find the y intercept.
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Slope m = 3/2, not 2/3
m = diffy/diffx, not x in the numerator.
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Then use y = mx + b and either point
Using (-2,7):
7 = (3/2)*-2 + b
b = 4
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--> y = 3x/2 + 4
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