Curated OER
How Do You Use a Scatter Plot to Find a Line of Fit?
What is a line-of-fit? Given a data set, plot the ordered pairs on a graph. It looks like a scatter plot. Now estimate, and draw a line that best fits what the data represents. That is your line-of-fit.
National Education Association
Independent and Dependent Variable
Introduce learners to independent and dependent variables with an informative video.The two variables are defined via inputs and outputs. It makes clear that the independent variable is the one that the person has control over, while the...
Northeast Arkansas Education Cooperative
Interpret the Rate of Change (Slope) within the Context of Everyday Life
With math all around us, your learners will see they can create an equation to model different situations. From fundraising to a cell phone plan, your mathematicians can find the starting point b, plug in the rate of change m, and create...
Krista King Math
Value that Makes Two Tangent Lines Parallel
Perform parallel calculations to find equal slopes. Using the formula for the equation of the tangent line to a point, the resource sets out to find two points with a difference of one that have parallel tangent lines.The 25th video in a...
Curated OER
How Do You Solve a Word Problem Using the Elimination by Subtraction Method?
Use word problems to teach systems of equations! The instructor in this video demonstrates how to solve a word problem using a system of equations and the elimination by subtraction method. She goes through each step, carefully...
Curated OER
Graphical System of Inequalities
If your class has a grasp on the concept of graphing systems of equations and has worked inequalities, then it's time to expose them to the wonders of graphing systems of inequalities. Using various colors and a graph, Sal explains what...
Corbett Maths
Perpendicular Lines
How are the slopes of perpendicular lines related? It turns out they are always opposite reciprocals. A video instructor emphasizes this fact with graphs, examples, and symbolic representations. He follows that instruction with...
Curated OER
What Does Undefined Slope Mean?
The graph of a line with an undefined slope is a vertical line. Why is it undefined? It has something to do with the value of the x-coordinate. The x-coordinate determines the run of the slope. So what if the run is zero? The instructor...
Curated OER
How Do You Determine if the Vertex of a Quadratic Function Will be a Maximum or Minimum?
The form of a quadratic function can help you determine if the vertex of a quadratic equation will be a minimum or a maximum of the function. If the coefficient of 'a' in the quadratic form of the equation is positive the vertex will be...
Curated OER
Systems of Three Variables 2
Sal uses the elimination method to simplify a system of three variables. Next, he employs the substitution method to check his solution. This resource would nicely complement any lesson on this topic.
Curated OER
What Are Horizontal Lines?
When looking at the coordinate pairs for an horizontal line, all the y-values will be equal. Yes, the same, no matter what the x-value is. And the line will never cross the x-axis. Check out this tutorial video to see what that actually...
Math Antics
What Is Algebra?
Simply defined, algebra is arithmetic involving an unknown. The video introduces algebra by making the connection to arithmetic. Using examples, the presentation explains the use of variables and notation. The resource previews graphing...
Krista King Math
Direct Variation
Viewers examine the properties of direct variation equations and use them to problem solve. The instructor describes the concept of direct variation and then applies the formula to a word problem. She shows the relationship between the...
Northeast Arkansas Education Cooperative
Functions
Relationships can be good or bad, but functional relationships are the best! The video demonstrates relationships in a table or graph and what makes their qualities functional. Have your learners review functions and then go through a...
National Education Association
Solving Absolute Value Inequalities
You know how to find absolute values and you know how to solve inequalities — but what happens when these two concepts are in the same problem? A YouTube video first reviews absolute values and moves on to solving absolute value...
Corbett Maths
Solving Quadratics Graphically – Advanced
Use an understanding of equality to find solutions of quadratics graphically. A well-designed lesson illustrates the relationship between the right and left sides of an equation graphically. With one side quadratic and the other side...
Curated OER
How Do You Use a Scatter Plot to Find No Correlation?
How do you determine the correlation in a set of data? Plot the data, find the line of fit, then use that line to determine if the correlation is positive, negative, or no correlation. This tutorial demonstrates that when a line of fit...
Curated OER
How Do You Solve a Word Problem Using an Absolute Value Inequality?
After reading this inequality word problem, young learners might just skip over it and not even make the attempt to solve it. It seems rather complicated. So watch this video as the teacher explains all that needs to be done to solve...
Curated OER
Translate Word Phrases and Sentences into Equations
Use this video to show your learners an example of how to translate word phrases into an equation to solve a real-world problem. The presenter begins with a review of how to use cross products to solve a proportion, including how to do...
Corbett Maths
Gradient of a Line
Steepness, gradient, and slope all refer to the same feature of a line. Young scholars watch and rewatch a video lesson to build a solid understanding of the relationship between the rise compared to the run of a line. Examples include...
Curated OER
What is the Maximum of a Quadratic Function?
What is the highest point of an upside-down parabola called? It's called the maximum of a quadratic function, also known as, the vertex.
Curated OER
What is the Minimum of a Quadratic Function?
What is the lowest point of a 'U' shaped parabola called? It's called the minimum of a quadratic function, also known as, the vertex.
Khan Academy
Fitting a Line to Data
Sal trades his tablet for an Excel spreadsheet in this video, which covers fitting data to a line. Using a word problem about median income, he not only solves the problem but demonstrates how to successfully use scatter plots and Excel...
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