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Mathematics 18 Online
OpenStudy (anonymous):

"The slope of a line that is perpendicular to a line that has an undefined slope is -1." Can anyone tell me if this if true or not and why, please?

OpenStudy (solomonzelman):

The slope that is perpendicular to an undefined slope is a slope that is equal to zero

OpenStudy (solomonzelman):

Undefined slope = Vertical line Vertical line is perpendicular to Horizontal line. Horizontal line has a slope of zero.

OpenStudy (anonymous):

Okay I get it now. Thank you very much. :)

OpenStudy (solomonzelman):

Anytime !

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