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Constant of Variation
The ratio between two variables in a direct variation or the product of two variables in an inverse variation. In the direct variation equations
= k and y = kx, and the inverse variation equations xy = k and y = 
, k is the constant of variation. -
Direct Variation
A statement of the form
= k or y = kx, where k is a constant of variation. -
Inverse Variation
A statement of the form xy = k or y =
, where k is a constant of variation.
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