Difference between two numerical values of a variable quantity.

Mathematical model that best describes the differences between the coordinate values of the points in the Cartesian graph of a relationship.

### Educational note

The term “variation” is sometimes used as a more concise way of referring to a “relationship of variation” of a certain type. For example, some authors write “The graph of a direct variation is…” instead of “The graph of a relationship of direct variation is…”

### See also :

- Coefficient of variation of a population (statistical variation)
- Relationship of direct variation
- Relationship of second-degree variation
- Relationship of cyclical variation
- Step function
- Relationship of exponential variation
- Relationship of inverse variation
- Relationship of zero variation
- Relationship of partial variation
- Direct variation
- Inverse variation
- Partial variation