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26 February, 21:49

The slope of a line passing through (-9, 10) and (-9, - 9) is ...

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Answers (2)
  1. 26 February, 22:58
    0
    0

    Step-by-step explanation:

    It is a horizontal line.
  2. 26 February, 23:23
    0
    undefined

    Step-by-step explanation:

    The slope of a line is found by

    m = (y2-y1) / (x2-x1)

    = (-9 - 10) / (-9 - - 9)

    = - 19 / (-9+9)

    = - 19/0

    We cannot divide by zero so the slope is undefined
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