CK-12 Foundation
Proportions: Lesson
Proportionally, one doesn't see much of cross multiplying in geometry. The portion of extensive playlist on geometry reviews proportions. Using properties of equality, the video shows why cross multiplying works for proportions.
Math Antics
Proportions
Equivalent ratios lead to proportions. The video provides the definition of a proportion and provides examples of proportions. Using real-world examples, the resource shows how to solve for unknown quantities in proportions using the...
Brightstorm
Solving Proportions
Find out if the amount of practice is proportional to better test scores. The video explains the steps learners perform to solve a proportion. Supplemental videos show examples of solving proportions of varying difficulty, which helps...
PBS
Working With Coordinate Planes: Student Video
Provide your mathematicians an introduction to coordinate planes with a captivating video featuring Virtual Math Girl. Viewers get a step-by-step description of how to use a single, positive number quadrant to plot ordered...
PBS
Working With Coordinate Planes: Instructor Video
Watch a video intended for teachers to gain pointers, tips, and tricks to teach learners how to graph ordered pairs on a coordinate plane, and to calculate distances with the distance formula. Additionally, obtain recommendations...
Scholastic
Study Jams! Proportions
Join Zoe and Sam as they use proportions to budget money for their Green Earth Club. Watch as they set up and solve a series of proportions using cross multiplication and division. A great resource that brings together prior knowledge of...
Virtual Nerd
Virtual Nerd: How Do You Check if a Point Is on a Line if You Have an Equation
Verifying that a point is part of the equation of a line is very simple! Follow the steps in this quick tutorial to learn how! [1:35]
Khan Academy
Khan Academy: Algebra: The Coordinate Plane
This video demonstrates how to identify the ordered pair of a point graphed on the coordinate plane and how to graph a point when given the ordered pair. It also goes a step further and demonstrates how to graph a geometric figure based...
Math TV
Math tv.com: Basic Mathematics: Solving Proportions
A math teacher and several students offer step-by-step solutions to questions involving proportions. Questions include, "In the proportion 3/4 = 6/8, name the four terms, the means, and the extremes" and "Solve for x: 2/3 = 4/x". In the...
Virtual Nerd
Virtual Nerd: How Do You Identify Points on a Graph?
Plotting points on the coordinate plane is the foundation of graphing equations. Before students can graph equations, get familiar with the coordinate plane here in this tutorial. [7:17]
Khan Academy
Khan Academy: Dependent and Independent Variables: Equations
Demonstrates how to determine the equation represented by a linear relationship shown on a graph. [2:00]
Khan Academy
Khan Academy: Graphing Proportional Relationships: Unit Rate
Video tutorial demonstrates how to graph the equation of a line that represents a proportional relationship given a unit rate. [4:30]
Khan Academy
Khan Academy: Graphing Proportional Relationships From a Table
Explore how to graph the equation of a line that represents a proportional relationship given a table. [1:10]
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]
Virtual Nerd
Virtual Nerd: How Do You Identify Points on a Graph?
Learn how to plot a point on a coordinate plane, identify the ordered pair, and figure out which quadrant the point is in. This video shows examples along with hints and tricks. [7:17]
Khan Academy
Khan Academy: Interpreting Graphs of Proportional Relationships
Learn how to read and understand graphs of proportional relationships.
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 and Proportions: Understanding Proportions
This video shows how to determine if a given proportion is true or false.
Sophia Learning
Sophia: Graphing Algebraic Equations
Graphing algebraic equations are explored in this lesson. The video tutorial investigates how to graph an algebraic equation on the coordinate system.
Sophia Learning
Sophia: Identifying Parallel, Intersecting, and Identical Lines
This video lesson demonstrates how to determine if linear equations are parallel, identical, or intersecting. Students can check their understanding with an assessment.
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: Comparing Linear Functions: Equations vs. Graph
Compares the equation of one linear function with the graph of another to determine which of the given statements about them are true. [2:22]
Imagine Learning Classroom
Learn Zillion: Convert Between Currencies and Find Exchange Rate
In this lesson, you will learn how to convert between two different currencies and find the exchange rate by solving proportions. [3:47]