8.EE.B.6
Use similar triangles to explain why the slope m is the same between any two distinct points on a non-vertical line in the coordinate plane; derive the equation y = mx for a line through the origin and the equation y = mx + b for a line intercepting the vertical axis at b.
Cluster 8.EE.BUnderstand the connections between proportional relationships, lines, and linear equations.
Where this sits in the school year
Our Grade 8 Math scope and sequence teaches 8.EE.B.6 in Unit 3: Proportional Relationships & Slope, weeks 7–9.
Use similar triangles to show slope is constant, and derive y = mx and y = mx + b. See the full pacing guide →
Builds on
Suggested prerequisites. This sequencing is our editorial guidance, not part of the Common Core.
Teaching Kits for this standard
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