If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains ***.kastatic.org** and ***.kasandbox.org** are unblocked.

Main content

Cartesian product of sets: Relations and functionsRelations: Relations and functionsDomain, codomain and range of relations: Relations and functionsWhat is a function?: Relations and functionsInputs and outputs of a function: Relations and functionsIntroduction to domain and range: Relations and functions

Mastery unavailable

Test your knowledge of the skills in this course. Have a test coming up? The Course challenge can help you understand what you need to review.