Khan Academy
Khan Academy: Determine the Domain of Functions
Determine the domain of a function according to the algebraic limitations of that function.
Khan Academy
Khan Academy: Domain and Range From Graph
Given the graph of a function, determine its domain or range.
Cuemath
Cuemath: Functions
In this mini-lesson, students will learn about the world of functions. They will explore topics such as how to represent a function, conditions for a function, how to solve a function, types of functions, and various graphs of functions....
CK-12 Foundation
Ck 12: Algebra Ii: 1.3 Domain and Range of a Function
This section will explore how to determine the domain and range of a function as well as to find the restrictions for the domain and range.
Mathematics Archives
Math Archives: Visual Calculus: Rational Functions
An explanation of what comprises the domain of a rational function. The information is brief, but formulas and examples are given along with additional links.
Curated OER
Definition of the Term Function
A thorough introduction to function terminology, including information about domain and range and when an equation represents a function.
Wolfram Research
Wolfram Mathworld: Inverse Function
Site gives a definition of the inverse function as well as the example of the inverse of f(x)=x. Also included are formulas and links to related sites.
Oregon State University
Oregon State University: Review of Rational Functions
This lesson on rational functions has a section on finding the domain which includes an example problem.
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: Terms and Warnings
Northeast Parallel Architecture Center, Syracuse University, provides a quick overview of the common terminology of functions, as well as restrictions on the domain and range of a function.
California State University
California State University: Domain and X Intercepts in Rational Functions
Description of the nature of the domain in rational functions.
Other
Radford Univ.: One to One Functions and Inverse Functions
This is a very short site from Radford University with a definition of One-To-One Functions and Inverse Functions.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Domains
Find a quick, concise explanation of what a domain is. An example is given and clearly explained.
Other
Radford University: One to One and Inverse Functions
This site from the Radford University provides a concise mathematical definition of one-to-one and inverse functions.