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March 26, 2017

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write an equation in slope-intercept formfor the line passing through each pair of points.

(12,5) and (-4,1)

pleae help me!!!! i don't understanf how to solve it

  • math - ,

    first find the slope
    slope =(5-1)/(12+4) = 4/16 = 1/4

    so y = (1/4)x + b
    but (-4,1) lies on it
    so 1 = (1/4)(-4) + b
    1 = -1+b
    b = 2

    equation: y = (1/4)x + 2

    I usually check if the other point satisfies,
    LS = 5
    RS + (1/4)(12 + 2
    = 3+2 = 5 = LS

    my equation is correct

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