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Slope of (18,-7) and (18,2)

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7 votes

Answer: Undefined

Work Shown

(x1,y1) = (18,-7) and (x2,y2) = (18,2)

m = slope = rise/run = (change in y)/(change in x)

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

m = (2 - (-7))/(18 - 18)

m = (2 + 7)/(18 - 18)

m = 9/0

m = Undefined

The slope is undefined because we cannot divide by zero. The slope of any vertical line is undefined.

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