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# 12.1: Inverse Variation Models

Difficulty Level: At Grade Created by: CK-12
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Practice Inverse Variation Models

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Estimated9 minsto complete
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Estimated9 minsto complete
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### Vocabulary Language: English

Constant of Proportionality

The constant of proportionality, commonly represented as $k$ is the constant ratio of two proportional quantities such as $x$ and $y$.

Direct Variation

When the dependent variable grows large or small as the independent variable does.

Inverse Variation

Inverse variation is a relationship between two variables in which the product of the two variables is equal to a constant. As one variable increases the second variable decreases proportionally.

Joint Variation

Variables exhibit joint variation if one variable varies directly as the product of two or more other variables.

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