# Nonlinear relationship > A relationship between two or more variables that can't be represented solely through addition and multiplication. A linear relationship can be represented as a line; a nonlinear relationship can't be represented as a line.[^1] A relationship between two or more variables that can't be represented solely through addition and multiplication. A linear relationship can be represented as a line; a nonlinear relationship can't be represented as a line.[^1] ## Footnotes [^1]: https://developers.google.com/machine-learning/glossary#nonlinear