direct variation


Definition of direct variation

1 : mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other
2 : an equation or function expressing direct variation — compare inverse variation

First Known Use of direct variation

circa 1949, in the meaning defined at sense 1

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The first known use of direct variation was circa 1949

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Cite this Entry

“Direct variation.” Dictionary, Merriam-Webster, Accessed 27 Oct. 2021.

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