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Slopes of Lines

Learn about slopes of lines, formula for slope calculation, and the parallel and perpendicular relationships between lines. Explore key postulates and common slope values.

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Slopes of Lines

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  1. Slopes of Lines Section 3-3

  2. Definition of Slope • The slope m of a line containing 2 points with coordinate (x1, y1) and (x2, y2) is given by the formula:

  3. Postulate 3-2 and 3-3 • 2 nonvertical lines have the same slope iff they are parallel. • 2 nonvertical lines are perpendicular iff the product of their slopes is –1.

  4. undefined slope zero slope positive slope negative slope

  5. Joke Time What do you call a hippo in a phone booth? stuck

  6. What would America be called if we all drove pink cars? A pink carnation

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