Proportionality

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 ${\displaystyle x\propto y}$. The fixed number of a proportionality relationship is called the constant of proportionality.

Related pages

• Relation (mathematics)
• Function (mathematics)

References

1. ↑ "Compendium of Mathematical Symbols". Math Vault. 2020-03-01. Retrieved 2020-09-20.
2. ↑ Weisstein, Eric W. "Proportional". mathworld.wolfram.com. Retrieved 2020-09-20.
3. ↑ "Directly Proportional and Inversely Proportional". www.mathsisfun.com. Retrieved 2020-09-20.

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