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# Comparing Equations of Parallel and Perpendicular Lines

## Use slope to identify parallel and perpendicular lines

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.

## Equations of Parallel and Perpendicular Lines

This concept introduces parallel and perpendicular lines and their relationship with slope.
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## Parallel Lines 2

How to determine if a set of lines are parallel, given their equations, as explained by Khan Academy.
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