Difference between revisions of "Proportionality (mathematics)"
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* [[Scalability]] | * [[Scalability]] | ||
* [[Scale (ratio)]] | * [[Scale (ratio)]] | ||
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== External links == | == External links == | ||
* [https://en.wikipedia.org/wiki/Proportionality Proportionality (mathematics)] @ Wikipedia | * [https://en.wikipedia.org/wiki/Proportionality Proportionality (mathematics)] @ Wikipedia | ||
Revision as of 07:20, 6 September 2015
In mathematics, two variables are proportional if a change in one is always accompanied by a change in the other, and if the changes are always related by use of a constant multiplier.
The constant is called the coefficient of proportionality or proportionality constant.
Discussion
If one variable is always the product of the other and a constant, the two are said to be directly proportional. x and y are directly proportional if the ratio \tfrac yx is constant.
If the product of the two variables is always equal to a constant, the two are said to be inversely proportional. x and y are inversely proportional if the product xy is constant.
See also
- Analogy
- Aspect ratio
- Golden ratio
- Mathematics
- Measurement
- Scalability
- Scale (ratio)
- Scaling (geometry)
External links
- Proportionality (mathematics) @ Wikipedia
