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Parallel lines have the same slope.

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Perpendicular lines have negative reciprocal slopes.

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What is the slope of the lines parallel and perpendicular to 5x - 3y = 8

Example:

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Write the equation in slope-Int. form of a line that passes through (-2, 4) and is perpendicular to 2x - 3y + 5 = 0

Example:

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Find the slope of the line containing (-3, 1) and (4, 0)Find the slope of the line perpendicular to that.

Example:

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The slope of one line is 2, and the slope of the line perpendicular to it is k-3

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Example:

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