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The formula direct variation is xk=y, where k is the constant of variation.

Direct variation functions always pass through the origin. Direct variation functions are linear functions (goes in a straight line), except that they pass through the origin. Regular linear functions don't pass through the origin. That is the only difference.

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โˆ™ 2012-09-24 23:14:38
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Q: How does the constant of variation affects the appearance of the graph of a direct variation function?
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