Functions are special relations, but are there special functions? A concept video defines a one-to-one function. Three problem videos cover examples in determining whether a relation is a function and whether it is a one-to-one function.

Concepts

functions, one-to-one correspondence

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Additional Tags

math

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Instructional Ideas

• Use the video as an intervention tool for learners struggling with one-to-one functions

Classroom Considerations

• Be sure learners watch all problem videos as each covers a different form (mappings, ordered pairs, and graphs)
• Learners should already be familiar with the definition of a function

Pros

• Simple, clear explanations

Cons

• Concept video is somewhat blurry