Linear Functions

Subject: Math  ·  Grade level: 8th

Read graphs, write equations, and use lines to model real-world change. A linear function is just a line on a graph — but lines describe everything from gas m

In this lesson

• Slope: rate of change
• Slope-intercept form: y = mx + b
• Modeling with lines

Key terms

Slope

The steepness of a line — rise divided by run.

Y-intercept

Where the line crosses the y-axis (when x = 0).

Linear

Forms a straight line when graphed.

Linear Functions lesson on BrightPath

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