National Education Association
Slope and Direct Variation
We all know linear equations are special, but the direct variation equation is extra special! The video begins with a set of data to illustrate a direct variation relationship. It then completes examples of writing direct variation...
Khan Academy
Khan Academy: Algebra: Recognizing Direct and Inverse Variation
Video showing how to manipulate sample equations to see if they represent direct or inverse variation or neither. Gives examples of values that make the equations true to explore further what is happening with the equations. Includes...
Khan Academy
Khan Academy: Algebra: Direct and Inverse Variation
Video describing direct and inverse variation by giving examples of equations and their corresponding table of values that fit each variation model. Includes link to additional practice at the top of the video. [9:54]
Khan Academy
Khan Academy: Algebra: Direct Variation Models
This video demonstrates how to create a direct variation model, or a linear equation, given a word problem that deals with rate of change. It also shows how to solve the equation and graph the direct variation model. Practice problems...
Khan Academy
Khan Academy: Algebra: Proportionality Constant for Direct Variation
This video demonstrates how to set up an equation for direct variation and solve for the variable "k" which represents the constant of proportionality. [1:44]
Khan Academy
Khan Academy: Algebra: Direct Variation 1
Video solving a direct variation problem about amounts of gas and the cost of filling up a car. Includes link to additional practice at the top of the video. [3:39]
Khan Academy
Khan Academy: Algebra: Direct Variation Application
This video demonstrates how to solve a word problem involving a direct variation. It shows how to set up a linear equation for a directly proportional relationship and solve for the constant of proportionality. [2:02]
Virtual Nerd
Virtual Nerd: What's the Constant of Variation?
Take a look at this tutorial to learn about the constant of variation, the relationship between two variables does not change. [3:21]
Virtual Nerd
Virtual Nerd: What Does Direct Variation Look Like on a Graph?
Tutorial demonstrates what a direct variation looks like graphically. [1:57]
Virtual Nerd
Virtual Nerd: How to Write an Equation for Direct Variation From a Table
This tutorial show how to take a table of values and describe the relation using a direct variation equation. [2:45]
Virtual Nerd
Virtual Nerd: Finding Constant of Variation From a Direct Variation Equation
The constant of variation is the number that relates two variables that are directly proportional or inversely proportional to one another. Watch this tutorial to see how to find the constant of variation for a direct variation equation....
Virtual Nerd
Virtual Nerd: Write an Equation for Direct Variation Given a Point
This tutorial shows how to take given information and turn it into a direct variation equation. Then, see how to use that equation to find the value of one of the variables. [2:04]
Sophia Learning
Sophia: Combined Variation
Explore how to solve combined variations which contain both direct and indirect variations. Take quiz to assess understanding.
Sophia Learning
Sophia: Direct Variation
Explore what a direct variation is and assess learning with a quiz.
Sophia Learning
Sophia: Direct Variation
This video lesson describes and provides examples of direct variation. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Direct Variation and Proportional Linear Relationships
Explore the relationship between direct variation and proportional linear relationships then assess learning with a quiz.
Sophia Learning
Sophia: Direct Variation Equations
This video tutorial demonstrates how to write, solve, and graph direct variation equations. The lesson provides detailed examples including word problems.
Virtual Nerd
Virtual Nerd: How Do You Use the Formula for Direct Variation?
In this tutorial, discover how to use the formula for direct variation to find the constant of variation and then solve for your answer. [2 :12]
Virtual Nerd
Virtual Nerd: Solve a Word Problem Using the Direct Variation Formula
Take a look at this word problem involving an object's weight on Earth compared to its weight on the Moon and see how the formula for direct variation plays an important role in finding the solution. [3:05]
Virtual Nerd
Virtual Nerd: How Do You Write an Equation for Direct Variation Given a Point?
Watch this tutorial to see how to take given information and turn it into a direct variation equation then use that equation to find the value of one of the variables. [2:05]
Khan Academy
Khan Academy: Proportionality Constant for Direct Variation
This video shows how to solve an equation using direct variation.
Khan Academy
Khan Academy: Direct and Inverse Variation: Inverse Variation Application
Aplication problem related to stringed instruments by first finding the constant of proportionality and then using it to find another value.
Khan Academy
Khan Academy: Algebra I Worked Examples: Direct Variation 1
Students watch a detailed example about direct variation. A video tutorial examines the algebra concept. [3:39]
Khan Academy
Khan Academy: Algebra: Direct Variation 1
This video demonstrates how to solve a word problem that involves a directly proportional relationship and rates. Given the price of gas per gallon and the total amount of money you must figure out how many gallons of gas could be...