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September 20, 2014

Homework Help: math-please help

Posted by pinkpolkadots7 on Tuesday, November 14, 2006 at 5:11pm.

Explain why the slope of a horizontal line is zero, and the slope of a vertical line is undefined.

The slope is the tangent of the enclosed angle. Tan = vertical side divided by horizontal side. With a horizontal line, the verticle side is zero and zero/any number is zero.
For the vertical line, the horizontal side is missing (zero) and any number divided by zero is undefined.

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