Simplest form or general written rule of a function that does not contain any parameters.

Some authors use the term “basic function” instead.

### Example

The basic form that defines a second-degree polynomial function is:

*f*(*x*) = *x*²

Simplest form or general written rule of a function that does not contain any parameters.

Some authors use the term “basic function” instead.

The basic form that defines a second-degree polynomial function is:

*f*(*x*) = *x*²