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Proportionality



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A proportionality relationship happens when two quantities or numbers x and y are related multiplicatively by a fixed number. This can occur when either their ratio x/y is a fixed number (direct proportionality), or their product xy is a fixed number (inverse proportionality). If x is directly proportional to y, then we write [math]x \propto y[/math].[1] The fixed number of a proportionality relationship is called the constant of proportionality.[2][3]

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References

  1. "Compendium of Mathematical Symbols" (in en-US). 2020-03-01. https://mathvault.ca/hub/higher-math/math-symbols/. 
  2. Weisstein, Eric W.. "Proportional" (in en). https://mathworld.wolfram.com/Proportional.html. 
  3. "Directly Proportional and Inversely Proportional". https://www.mathsisfun.com/algebra/directly-inversely-proportional.html.