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# 2.3 Notes - when the line is increasing The slope is...

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Slide 1 Linear Equations College Algebra Section 2.3 Slide 2 Linear Function A function f is a linear function if, for real numbers a and b, f(x) = ax + b. The standard form of a linear equation is Ax + By = C Slide 3 Slope The slope m of the line through the points (x 1 ,y 1 ) and (x 2 ,y 2 ) is 1 2 1 2 x x y y x in change y in change run rise m - - = = =

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Slide 4 Facts About Slope The slope is the average rate of change . The slope is positive
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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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