Algebra

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Write the slope-intercept equation for the line through (3, 7) and (9, 3)

  • Algebra -

    The slope-intercept form is y = mx + b

    7 = m*3 + b
    3 = m*9 + b
    Subtract second equation from the first, to eliminate the unknown b.

    4 = -6m
    m = -2/3

    7 = -2 + b
    b = 9

    y = -(2/3)x + 9

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