## Quick Reference

(of a function or mapping)

For a real function *f*, the graph of *f* is the set of all pairs (*x*, *y*) in **R**×**R** such that *y*=*f*(*x*) and *x* is in the domain of the function. For many real functions of interest, this gives a set of points that form a curve of some sort, possibly in a number of parts, that can be drawn in the plane. Such a curve defined by *y*=*f*(*x*) is also called the graph of *f*. See also mapping.

*Subjects:*
Mathematics.

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