Answer: undefined slope
what slope does a VERTICAL line have?

The slope of a vertical line is undefined. That's because in a horizontal line the change in the x-value will always be 0. You can figure this out by calculating the horizontal difference between the two x-coordinates. Remember the slope formula: With a vertical line this results in a bottom denominator of 0.

The slope of a line is change in Y / change in X. The slope of a horizontal line = 0 not undefined. The slope of a vertical line = undefined. In this regard does 0 slope mean undefined?

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what slope does a VERTICAL line have? The slope of a vertical line is undefined. That's because in a horizontal line the change in the x-value will always be 0. You can figure this out by calculating the horizontal difference between the two x-coordinates. Remember the slope formula: With a vertical line this r...