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Unformatted text preview: when the line is increasing . The slope is negative when the line is decreasing . Pitch and grade are other common names for slope. Slide 5 Horizontal and Vertical Lines A horizontal line has the standard form y = b and slope of zero. (m = 0) A vertical line has the standard form x = a and does not have a slope . (m is undefined)...
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 Spring '08
 DUCK
 Linear Equations, Equations, Slope, Quadratic equation, Elementary algebra, Quintic equation

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