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 . The fixed number of a proportionality relationship is called the constant of proportionality.
Related pages[change | change source]
References[change | change source]
- "Compendium of Mathematical Symbols". Math Vault. 2020-03-01. Retrieved 2020-09-20.
- Weisstein, Eric W. "Proportional". mathworld.wolfram.com. Retrieved 2020-09-20.
- "Directly Proportional and Inversely Proportional". www.mathsisfun.com. Retrieved 2020-09-20.