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1.3 Introduction to Functions

Different Types of Relations

  • Below are four types of possible relations:

a) One-to-one

Precalculus Concepts: One-to-One - Expii

b) One-to-many

one-to-many - Wiktionary

c) Many-to-one

Function Definition and Many-to-One, One to One Examples - YouTube

d) Many-to-many

Is this a partial non injective non surjective function? - Mathematics Stack Exchange
  • The interpretation is quite straightforward.

a) One-to-one relations means that for every element in the domain set (or simply every value of x), there is one and only one corresponding element in the range (as in, one corresponding y).

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