Difference between revisions of "Proportionality (mathematics)"

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== External links ==  
 
== External links ==  
  
* [https://en.wikipedia.org/wiki/Proportionality (mathematics) Proportionality (mathematics)] @ Wikipedia
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* [https://en.wikipedia.org/wiki/Proportionality Proportionality (mathematics)] @ Wikipedia

Revision as of 04:10, 31 August 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

External links