Khan Academy
Khan Academy: Writing Proportional Equations
Writing an equation to describe the relationship between the number of scoops in an ice cream cone and the price.
Virtual Nerd
Virtual Nerd: What's a Proportion?
Watch this tutorial to learn why proportions are actually equations with equal ratios. [3:45]
Khan Academy
Khan Academy: Rates & Proportional Relationships: Gas Mileage
Video explores rates and proportional relationships using a gas mileage problem. [3:18]
Khan Academy
Khan Academy: Graphing Proportional Relationships From an Equation
Video lesson shows how to graph the equation of a line that represents a proportional relationship given an equation. [3:08]
Khan Academy
Khan Academy: Ratios With Algebra: Find an Unknown in a Proportion
Video demonstrates how to find an unknown in a proportion three different ways..
Khan Academy
Khan Academy: Ratios With Algebra: Ratio Problem With Basic Algebra
A step-by-step breakdown on how to solve ratio problems with algebra.
Khan Academy
Khan Academy: Ratios and Proportions: Understanding Proportions
This video shows how to determine if a given proportion is true or false.
Planet Nutshell
Planet Nutshell: Math Shorts: Proportional Relationships
Planet Nutshell Math Shorts provide animated videos that explain various math topics. On this site, students learn about proportional relationships.
Sophia Learning
Sophia: Determining Proportionality Using Graphs and Tables
Determine whether objects of different shapes and sizes are proportional. Check understanding with a quiz.
Khan Academy
Khan Academy: Rates & Proportional Relationships
Video explores how to compare a rate given in an equation to a rate shown on a graph. [1:24]
Imagine Learning Classroom
Learn Zillion: Identify the Constant of Proportionality From a Diagram
In this lesson, you will learn how to identify the constant of proportionality from a labeled diagram by writing an equation of the form y=mx and solving for m. [3:56]
Math Mammoth
Math Mammoth: Proportional Relationships / Direct Variation
This lesson explains several ways to determine if variables are in a proportional relationship. An example of a non-proportional relationship is given and inverse variation and direct variation are discussed. [11:55]
Other
Algebra2go: Solving Proportions
Professor Perez's virtual classroom provides examples that demonstrate how to solve proportion problems. [7:18]
Khan Academy
Khan Academy: Equations for Proportional Relationships
Learn how to write a proportional equation y=kx.
Art of Problem Solving
Art of Problem Solving: Proportion
Video tutorial uses examples to reinforce understanding of proportions. [7:09]
Loyola University Chicago
Math Flix: Using Proportion
This QuickTime movie gives examples of how to use the concept of proportion. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept.
Loyola University Chicago
Math Flix: Proportion Introduction
This QuickTime movie introduces the concept of proportion. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept.
NEAPortal
Nea Portal:solve Real World Problems That Involve a Combination of Rates, Proport
This lesson is about solving real world problems that involve a combination of rates, proportions and percents. Also, it is aligned to a common core state standard CC.9-12.N.Q.2. [10:59]
Art of Problem Solving
Art of Problem Solving: Multi Part Ratios
An introduction to multi-part ratios. [5:25]
Sophia Learning
Sophia: Solving Algebraic Problems Using Fractions and Decimals
Solve algebraic problems arising from situations that involve fractions, decimals, and proportionality/direct variation. This lesson is 2 of 2 in the series titled "Solving Algebraic Problems using Fractions, Decimals, and Proportionality."
Sophia Learning
Sophia: Solving Algebraic Problems Using Fractions and Decimals
Solve algebraic problems arising from situations that involve fractions, decimals, and proportionality/direct variation. This lesson is 1 of 2 in the series titled "Solving Algebraic Problems using Fractions, Decimals, and Proportionality."
Sophia Learning
Sophia: Solving Algebraic Proportions in 1 Variable: Lesson 1
Solve algebraic proportions in one variable which result in linear or quadratic equations. This lesson is 1 of 3 in the series titled "Solving Algebraic Proportions in 1 Variable."
Sophia Learning
Sophia: Using Equations to Describe Proportions
This lesson explains how proportional relationships can be described using equations.