# Functions - Domain, Range

Videos and lessons to help High School students understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If f is a function and x is an element of its domain, then f(x) denotes the output of f corresponding to the input x. The graph of f is the graph of the equation y = f(x).

Common Core: HSF-IF.A.1 Introduction to Functions - Part 1
This video introduces the definition of a function, domain, and range.

Introduction to Functions - Part 2
This video shows how to graph a function and how to determine the domain and range of a function.

Determining Domain and Range

Ex: Give the Domain and Range Given the Graph of a Function
This video provides an example of how to determine the domain and range of a function given the graph of a function. The domain and range are given using interval notation and using a compound inequality.

Ex 1: Determine the Domain and Range of the Graph of a Function
This video provides two examples of how to determine the domain and range of a function given as a graph.

Ex 2: Determine the Domain and Range of the Graph of a Function
This video provides two examples of how to determine the domain and range of a function given as a graph.

Determine if a Relation is a Function

Ex 1: Determine if the Graph of a Relation is a One-to-One Function
This video explains how to use the vertical line test and the horizontal line test to determine if the graph of a relations is a one to one function.

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