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If (8, 7) are the coordinates of a point on a line that has slope –3, what is the y-coordinate of the point on the line at which x=1

  • math -

    first find the equation:

    with slope of -3 and the point(8,7) on it, using
    y = mx + b
    7 = -3(8) + b
    31

    y = -3x + 31
    when x = 1
    y = -3(1) + 31 = 28

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