Learn to determine if a relation given by a set of ordered pairs is a function. Created by Sal Khan and Monterey Institute for Technology and Education.

Practice Up next for you: Reflexive, symmetric and transitive relations (basic) Get 3 of 4 questions to level up!

Unit 14: Relations and functions Types of relations Learn Reflexive relations Symmetric relations

Describe qualitatively the functional relationship between two quantities by analyzing a graph (e.g., where the function is increasing or decreasing, linear or nonlinear).

Practice Check whether the relation is a function Get 3 of 4 questions to level up!

This topic covers: - Radicals & rational exponents - Graphs & end behavior of exponential functions - Manipulating exponential expressions using exponent properties - Exponential …

Composition of functions and invertible function Learn Intro to composing functions Evaluating composite functions

Graphically, if any vertical line passes through two or more points, then the graph (or relation) is not a function. In other words, for a relation to be a function, every x-coordinate must go with …

From the information given, is there a functional relationship between each person and his or her height? So a good place to start is just think about what a functional relationship means.

Sal explains what inverse functions are. Then he explains how to algebraically find the inverse of a function and looks at the graphical relationship between inverse functions.