Khan Academy
Khan Academy: Domain and Range From Graph
Given the graph of a function, determine its domain or range.
Cuemath
Cuemath: Polynomial Functions
A comprehensive guide for learning all about polynomial functions with definitions, the highest degree of the polynomial, graphing polynomial functions, range and domain of polynomial functions, solved examples, and practice questions.
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.