What Is a Function? | Precalculus

This math video tutorial explains what a function is.  It is a special relation where there is exactly one output for every input.  This video explains how to evaluate a function and how to determine if a graph represents a function using the vertical line test.

Access Full-Length Premium Videos:               Patreon: MathScienceTutor
_______________________________________________________________________________________________
Algebra For Beginners:                                         Algebra For Beginners - Basic Introdu...
Algebra 1 Review Study Guide:                           Algebra 1 Review Study Guide - Online...
Algebra Final Exam Review:                                Algebra Final Exam Review
Pre-Calculus Final Exam Review:                       Precalculus Final Exam Review
______________________________________________________________________________________________
Introduction to Functions:                                     Functions - Vertical Line Test, Order...
Evaluating Functions:                                             Evaluating Functions - Basic Introduc...
Function Operations:                                              Function Operations
Increasing and Decreasing Functions:                Increasing and Decreasing Functions -...
Relative Maximum and Minimum Values:          Identifying The Relative Maximum and ...
Relations and Functions:                                       Relations and Functions | Algebra
Domain and Range From a Graph:                       Domain and Range of a Function From a...
How To Find The Domain of a Function:             How To Find The Domain of a Function ...
Average Rate of Change of a Function:               Average Rate of Change of a Function ...
The Difference Quotient of a Function:               Difference Quotient
Evaluating Piecewise Functions:                          Evaluating Piecewise Functions | PreC...
Graphing Piecewise Functions:                            Graphing Piecewise Functions - Precal...
Composite Functions:                                            Composite Functions
How To Evaluate Composite Functions:              How To Evaluate Composite Functions U...
Evaluating Composite Functions - Data Table:   How To Evaluate Composite Functions U...
Composition of 3 Functions With Data Table:    Composition of Three Functions With D...
Decomposing Functions:                                       Decomposing Functions - Composition o...
Introduction to Inverse Functions:                        Introduction to Inverse Functions
How To Find The Inverse of a Function:              How To Find The Inverse of a Function
Verifying Inverse Functions:                                  Verifying Inverse Functions | Precalc...
Horizontal Line Test - One to One Functions:     Horizontal Line Test and One to One F...
Vertical Line Test:                                                    Vertical Line Test
Graphing Inverse Functions:                                  Graphing Inverse Functions
Composite Functions and Inverse Functions:    Composite Functions and Inverse Funct...
Even and Odd Functions:                                       Even, Odd, or Neither Functions The E...
Transformations of Functions:                             Transformations of Functions | Precal...
Linear Functions:                                                    Linear Functions
The Weird Graph of Y = X^X:                                 The Weird Graph of y = x^x
Functions and Graphs - Practice Problems:       Functions and Graphs | Precalculus
Functions - Test Review:                                        Functions
______________________________________________________________________________________________
Logarithms Practice Problems:                         Logarithms - Practice Problems
Writing Equations of Ellipses:                            Writing Equations of Ellipses In Stan...
Hyperbolas - Conic Sections:                             Hyperbolas - Conic Sections
Arithmetic Sequences:                                        Arithmetic Sequences and Arithmetic S...
Geometric Sequences:                                        Geometric Series and Geometric Sequen...
Probability - Basic Intro:                                      Introduction to Probability, Basic Ov...
Intro to Statistics:                                                Introduction to Statistics

• #education
• #functions