What is a direct variation?

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According to mathematical terms, direct variation can be described as a relationship between two variables wherein their ratio remains constant. An equation or function expressing such a relationship.
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What Is a Direct Variation?
Direct variation, also referred to as direct proportion, occurs when two numbers move in constant relation, or direct proportion, to one another. One of these numbers is modified by a constant value, or k, which can be summarized in mathematical notation... More »
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In the study of mathematics, the direct variation refers to two quantities that are proportional, meaning that when one multiplies, the other multiplies by a set integer. You can find more information here: en.wikipedia.org/wiki/Direct_variation
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