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# Families of Lines

## Lines sharing a point or slope

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Families of Lines

Find the equation of a line that is parallel or perpendicular to a given line.
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• PLIX

## Families of Lines: Room in Perspective

Families of Lines Interactive
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• Video

## Equations of Parallel and Perpendicular Lines: A Sample Application

This video demonstrates a sample use of the equations of parallel and perpendicular lines.
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• Video

## Equations of Parallel and Perpendicular Lines: An Explanation of the Concept

This video provides an explanation of the concept of the equations of parallel and perpendicular lines.
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## Families of Lines Quiz

Quiz for Families of Lines.
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• Critical Thinking

## Families of Lines Discussion Questions

A list of student-submitted discussion questions for Families of Lines.
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• Real World Application

## Parallel & Perpendicular Lines

Students will apply their understanding of finding the equations of parallel and perpendicular lines to pictures they see in everyday life.
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• Real World Application