Background Tutorials

• Introduction to Algebraic Expressions

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    How Do You Evaluate an Algebraic Expression?

    Plugging variables into an expression is essential for solving many algebra problems. See how to plug in variable values by watching this tutorial.

• Defining Slope

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    What's the Formula for Slope?

    When you're dealing with linear equations, you may be asked to find the slope of a line. That's when knowing the slope formula really comes in handy! Learn the formula to find the slope of a line by watching this tutorial.

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    What Does the Slope of a Line Mean?

    You can't learn about linear equations without learning about slope. The slope of a line is the steepness of the line. There are many ways to think about slope. Slope is the rise over the run, the change in 'y' over the change in 'x', or the gradient of a line. Check out this tutorial to learn about slope!

• Working with Slope-Intercept Form

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    What's Slope-Intercept Form of a Linear Equation?

    When you're learning about linear equations, you're bound to run into the point-slope form of a line. This form is quite useful in creating an equation of a line if you're given the slope and a point on the line. Watch this tutorial, and learn about the point-slope form of a line!

• Working with Point-Slope Form

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    What's Point-Slope Form of a Linear Equation?

    When you're learning about linear equations, you're bound to run into the point-slope form of a line. This form is quite useful in creating an equation of a line if you're given the slope and a point on the line. Watch this tutorial, and learn about the point-slope form of a line!

• Finding Correlations with Scatter Plots

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    How Do You Use a Scatter Plot to Find a Line of Fit?

    A line-of-fit is a line that summarizes the trend in a set of data. In this tutorial, you'll see how to graph data on a coordinate plane and draw a line-of-fit for that data. Check it out!