Linear Functions

Subject: Math  ·  Grade level: 8th

Slope-intercept form, graphing lines, and modeling real-world rates.

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

BrightPath Tutoring offers free interactive lessons and 1-on-1 tutoring for students in grades 3–12. Based in the San Fernando Valley, Los Angeles, CA.