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# Relations and Functions

## Comparison of two or more sets of values, and cases where input corresponds with exactly one output.

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.

## Defining Relations and Functions

by Steven Rattendi //at grade
This lesson introduces the concepts of relations and functions.
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## Relations and Functions

by Tiziana Dolso //at grade
Definition of a function and how to identify a function.
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## Relations and Functions

by Molly Barrett //at grade
Definition of a function and how to identify a function.
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## Relations and Functions

by Kaitlyn Spong //at grade
Definition of a function and how to identify a function.
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## Relations and Basics of Functions

by EPISD Precalculus Team //at grade
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## Formalizing Relations and Functions

by SFDR Algebra I //at grade
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## Relations and Functions

by Helen Pennebaker //at grade
Definition of a function and how to identify a function.
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