This unit introduces linear equations and their various forms.

### The Coordinate Plane

by Sal Khan
This video shows how to read and map points on a coordinate plane.
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### Graphing Using Intercepts

by Sal Khan
This video shows how to graph lines on a coordinate plane using x and y intercepts. One word problem is used as an example.
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### Graphs of Linear Equations

by Sal Khan
This video demonstrates the basics of graphing linear equations by mapping points. It demonstrates how to do this using a word problem. It also shows how to read graphs of linear equations.
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### Slope and Rate of Change

by Sal Khan
This video gives the definition of a slope and shows how to find the slope of a graphed line.
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### Graphs Using Slope-Intercept Form

by Sal Khan
This video introduces the viewer to the slope-intercept equation for lines. It demonstrates how to write the equation of a line when given a graph and how graph a line from an equation.
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### Direct Variation Models

by Sal Khan
This video presents word problems that lead to direct variation equations.
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### Linear Function Graphs

by Sal Khan
This video give a definition of a function and shows how to evaluate different functions using some simple values and variables. The video also shows how you determine if a graph is a function.
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### Word Problem Solving

by Sal Khan
This video solves several word problems using the slope intercept form of the equation and by graphing.
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