3-6 Slopes of Parallel and Perpendicular Lines

# 3-6 Slopes of Parallel and Perpendicular Lines - • If 2...

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Slopes of Parallel & Perpendicular Lines Section 3-6

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Definition of Slope The slope m of a line containing 2 points with coordinate (x 1 , y 1 ) and (x 2 , y 2 ) is given by the formula: 2 1 1 2 1 2 , x x where x x y y m - - = run horizontal rise vertical slope =
Slopes of Parallel Lines If 2 nonvertical lines are parallel, their slopes are equal. If the slopes of 2 distinct nonvertical lines are equal, the lines are parallel. Any 2 vertical lines are parallel.

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Slopes of Perpendicular Lines

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Unformatted text preview: • If 2 nonvertical lines are perpendicular, the product of their slopes is -1. • If the slopes of 2 lines have a product of -1, the lines are perpendicular. • Any horizontal line and vertical line are perpendicular. undefined slope zero slope positive slope negative slope Joke Time What do you call a hippo in a phone booth? stuck What would America be called if we all drove pink cars? A pink carnation...
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## This note was uploaded on 12/01/2011 for the course MATH 105 taught by Professor Towns during the Fall '10 term at BYU.

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3-6 Slopes of Parallel and Perpendicular Lines - • If 2...

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