Parallel lines must always have the same slope. Learners use this bit of information to extend their equation writing skills. A video lesson explains how to write the equation of a line parallel to a given line and through a given point. The video instructor then demonstrates the calculations using slope-intercept form.

Concepts

parallel lines, slope, y-intercepts, linear equations, linear equations writing

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Additional Tags

math

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Instructional Ideas

• Have pupils begin by completing a discovery activity to learn that the slopes of parallel lines are equal
• Extend the lesson to include perpendicular lines for more advanced pupils

Classroom Considerations

• Assumes students know how to write the equation of a line given a point and slope

Pros

• Relates the equation of the lines to their graph
• Uses visuals to reinforce the concepts

Cons

• None

Common Core

SL.8.2 HSG-GPE.B.5 RST.6-8.7 RST.9-10.7