Slope Teacher Resources

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Given a line on a graph, what's the slope of this line? First, identify two points on the given line. Then, use a formula to find the change in y and then the change in x. This will be represented by rise over run. Watch this video to see how to solve this problem.
Introducing slope as "a way of measuring the inclination of a line," Sal endeavors to provide a working knowledge of slope problems and problem solving. The video is framed as a review, but could be a good way to fill any holes in mathematical knowledge.
Here is the second video in a three-part series on determining the slope of a line. This presentation focuses on defining mathematical terminology and the step-by-step process needed to find the slope the goes through the ordered pairs (4, 2) and (-3, 16). This is a good introduction to the topic.
Evaluate the steepness of lines, also known as the slope, by watching this video. A tutor explains what the slope of a line is and compares two different lines to demonstrate slope. A practical introductory video for classes that are just beginning instruction on slope.
Introduce your next math lesson with video that explains how to find the slope of a line through text and visuals. A brief definition and quick example are shown within the first 30 seconds. Note: There is no audio in this video.
Here is an introductory lesson to get a sense of the slope of a line, whether positive or negative, and the meaning of the y-intercept. Several examples of changes in slope are shown on a graph and the instructor relates it to how the equation changes to get that line.
The instructor uses a computer graphing program to illustrate how a line changes slope by manipulating the slope values in the equation. He also manipulates the y-intercept value to see where the line crosses the y-axis.
Starting with three linear equations, how can you tell which lines are parallel? The first equation is rewritten in slope-intercept form. The second equation represents a horizontal line, so it is already in slope-intercept form. The third equation is rewritten in slope-intercept form to verify that the slope was easily determined from the original form. In the final part of the video, the slopes are then compared to find parallel lines.
Given two points on a line, this video shows how to write the linear equation in point-slope form, slope-intercept form, and standard form. First, Sal reviews each of these forms, then calculates the slope, writes the equation in point-slope form, and finally converts the equation into the other two forms.
Here is fairly basic video that takes three equations, each written in slope-intercept form, with the goal of determining whether the lines are parallel.  Sal graphs each of the equations on the same coordinate plane to show how their slopes compare. The video assumes the listener has a basic knowledge of graphing lines in slope-intercept form and what it means for lines to be parallel.
This video shows how to graph a linear equation in standard form. He shows three different examples where he changes each equation into slope-intercept form and graphs it. One of the examples is a line with a negative slope, one is a vertical line, and the last is a horizontal line.
Can you tell, algebraically, if three lines are parallel? In this video, Sal demonstrates how to rewrite linear equations in slope-intercept form and compare the slope of each line.
This video explores the following problem: Write the equation of a line in slope-intercept form, given a point and an equation of a line that is perpendicular to the line. First the slope is determined based on the known relationship between perpendicular lines, then b is found by substituting the point into the y = mx + b equation for x and y and solving for b.
This video demonstrates how to tell algebraically whether lines are perpendicular. Using three different linear equations in different forms, each is rewritten in slope-intercept form, and their slopes are compared to show whether they are negative inverse of each other.
Given two points on a line, find the value for slope using the rise over run formula. Then find the y-intercept by plugging one of the point values into the equation of a line. Finally, put these values into the equation of a line y = mx+ b.
Given a graphed line, can you find the slope of the line? In this video, Sal shows how to calculate the change in y over the change in x. He also shows how one can pick any two points on line and still calculate the same slope.
Viewers will learn how to graph lines, such as y=2x+1. The instructor emphasizes the relationship between the x and y variables, creates an x/y table, and finally graphs the equation. A total of three examples are given in this video.
In this short video, Sal shows how to graph a line in slope-intercept form.
Learners discover a method for determining the slope of a line by creating and comparing similar triangles. They fold coordinate grids to make three similar triangles then measure the sides to compare the relationships between the triangles. The slope equation or rise over run is developed from these relationships.
Students graph linear equations using slopes and intercepts. In this algebra lesson, students identify the slope as being positive,negative or undefined. They differentiate between different quadrants on a coordinate plane.

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