Question 1093752: Determine the equation of the the straight line that passes through points (2;-7) and (1;4) Found 2 solutions by Alan3354, rothauserc:Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Determine the equation of the the straight line that passes through points (2;-7) and (1;4)
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Use commas for points, not semi-colons.
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Determine the equation of the the straight line that passes through points (2,-7) and (1,4)
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Step 1, find the slope
Slope, m = diffy/diffx
m = (-7-4)/(2-1)
m = -11
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Use y-y1 = m*(x-x1) where (x1,y1) is either point
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y - 4 = -11*(x - 1)
You can put this solution on YOUR website! slope = (4-(-7)) / (1-2) = -11
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y = -11x +b
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now use point (2,-7) to find the y intercept
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-7 = -11(2) +b
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b = -7 +22 = 15
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y = -11x +15
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