A vertical line:
O has an undefined slope.
O has a slope of zero.
O has a midpoint equal to half its length.
O doesn’t have an equation.
O has no real solutions.


  1. Answer:
    Has an undefined slope
    Step-by-step explanation:
    The slope formula is y2-y1 / x2-x1.
    When the x values are the same, like they are in a vertical line, you get 0 in the denominator. You can’t divide by 0, so the slope is undefined


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