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Direct Variation - MathHelp.com - Algebra Help

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Uploaded on Apr 24, 2008

For a complete lesson on direct variation, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn that if each y value in a function is the result of multiplying each x value by the same number, then the function is an example of direct variation. And the formula for direct variation is y = kx, where k represents the constant of variation. Students also learn that the formula for direct variation, y = kx, is a linear function, where the slope is equal to k, and the y-intercept is equal to 0. Students are then asked to determine if given graphs and tables of ordered pairs are examples of direct variation, as well as solve direct variation word problems.

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