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# Vertical Line Test

## Not a function if a vertical line crosses graph in 2+ places

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.

## Vertical Line Test

by CK-12 //basic
Learn how to determine whether or not a relation is a function.
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• Video

## Functions as Graphs

by CK-12 //basic
Explains how to apply the rules of functions to points and graphs on a coordinate plane.
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• Video

by CK-12 //basic
Learn about the domain and range of functions as well as identifying independent and dependent variables. The vertical line test and definition of a function is also explained.
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## Vertical Line Test Quiz

by CK-12 //basic
Quiz on Vertical Line Test.
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• Flashcards

## Vertical Line Test Flashcards

by CK-12 //basic
These flashcards help you study important terms and vocabulary from Vertical Line Test.
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