Khan Academy
What is the Domain of a Function?, Functions, Algebra I
After defining a simple function from a word problem, a short video shows how to find its domain and range. The instruction reinforces the definitions of domain and range with a concrete example.
Khan Academy
Introduction to Function Inverses, Functions and Their Graphs, Algebra II
Starting from a brief look at functions and the mapping of domains to ranges, Sal starts with an intuitive sense of what a function inverse is. Using an example, he then shows how to find the inverse of a function and how the graph of...
Khan Academy
Exponential Growth Functions, Exponential and Logarithmic Functions, Algebra II
Sal solves several problems involving exponential growth functions for two reasons. First, he aims to familiarize viewers with the process, particularly for those who find exponents challenging or daunting. Second, Sal wants to show how...
Khan Academy
Testing If a Relationship is a Function, Functions and Their Graphs, Algebra II
This short video looks at different points on a coordinate plane and answers a question about whether these points could represent a function. The answer is determined by looking at each point individually to determine whether, given a...
Khan Academy
Introduction to Functions
In this introduction to functions video, Sal intuitively defines a function and introduces the function notion f(x). He finishes the video by looking at a simple example of evaluating g(f(x)) without getting into the complexity of...
Khan Academy
Another Rational Function Graph Example, Algebra II
Extending his asymptotes lesson from the previous video, Sal shows viewers another example of graphing rational functions. This video is shorter than the previous one and could be shown in a single class session.
Brightstorm
Power Functions - Concept
Exponents are number 34897 to the power of 0! The short video explains what a power function is. It also demonstrates how to identify the n portion in a standard, fraction, and square root example.
Northeast Arkansas Education Cooperative
Function Families and Their Connections Including Vertical Shift of an Absolute Value Function
One of the strongest tools an algebra learner develops is the ability to quickly and accurately graph almost any given function. Often doing this quickly and accurately requires rigid transformations to a parent function,...
Corbett Maths
Function Machines
It's not a time machine—it's a function machine! Using two rules, the video introduces a function machine that changes an input to an output. Pupils answer questions such as finding what is the input for a given output and what values...
Khan Academy
Function Inverses Example 1
Sal continues looking at function inverses in this video by showing two examples. In each example, he finds the inverse and shows the graph of both functions. His examples are with linear functions, but his first example shows a function...
Khan Academy
Domain of a Function, Functions and their Graphs, Algebra II
We look at several examples of functions and see their domain. Sal writes the domain in set notion and shows how different functions can have different input values that cause the function to be undefined.
Khan Academy
Domain of a Function, Functions and Their Graphs, Algebra II
We look at several different examples of functions and see what their domain is. Sal writes the domain in a set notion and shows how different functions can have different input values that cause them to be undefined.
Khan Academy
Function Inverses 3
Sal continues showing examples of finding the inverse of the function. Here, he shows a subtle but essential technique of taking the negative square root of each side of the equation when solving for the inverse because of the...
Khan Academy
Basic Linear Function
This video explores a basic linear cost equation. Given a rate-per-photo and a one-time cost, write a function representing the amount a customer would pay for x number of photos.
Math Antics
What Are Functions?
Setup the idea of functions for the class. Using sets, the presentation introduces the concept of a function. The initial example uses a general function but then moves on to equations as functions. The video provides an example of an...
Curated OER
How Can You Tell if a Function is Linear or Nonlinear From a Table?
Is it possible to tell if a table of values represents a linear function or a nonlinear function? One way is to graph the ordered pairs to see if it makes a straight line. But, take a look at the rate of change in the table. If the rate...
Curated OER
Evaluating a Function for a Variable
This video tutorial does not include narration, but great math music. It describes how to evaluate a function for a variable through example, and procedure. This would be a great clip to assign as homework for learners just beginning to...
Curated OER
How Do You Figure Out If a Relation is a Function?
If a relation is to be considered a function then the values in the domain can only appear once in the table. It does not matter how many times a value appears in the range. Set up a table using the given values to check and see if the...
Calculus Expert
Combinations of Functions and Their Domains
We add numbers, so why not functions? A math video explains the process of combining functions using addition, subtraction, multiplication, and division. The instructor then finds the domain for each new function.
Educator.com
Average Value of a Function
Viewers learn how to find the average of a variable density with a video made for AP Calculus. The presenter applies the formula to find the average value of a function with an example that provides a density function for a rod. The...
Curated OER
How Do You Use the Vertical Line Test to Figure Out if a Graph is a Function?
How does the vertical line test help you decide if the graph of an equation is a function? The instructor draws a graph and then draws the line of the equation. She demonstrates how to use the vertical line test to determine if the graph...
Calculus Expert
How to Classify Functions
By the time pupils get to upper-level math courses, they have experience with many different types of functions. How do they keep them all straight? The lesson classifies functions into their types and breaks down those types into...
Mathispower4u
Linear Function Application
Bring the video in tow when studying linear functions. Young pupils learn to apply linear functions to real-world contexts by watching a short instructional video. Given information about the cost of hiring a tow company, they create a...
Curated OER
What is a Quadratic Function?
This is an introductory video on how to identify a quadratic function. This video explains what a quadratic function is and what the graph of a quadratic function looks like. The instructor goes through 4 examples of quadratic functions...
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