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How do you know if the mapping is a function
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How do you know if the mapping is a function

How do you know if the mapping is a function-example-1
User Nick Surmanidze
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Answer:

Suppose every object in the domain has only one image in the codomain, then the mapping is a function. Otherwise, it is not a functions

Looking at the given mapping:

-2 is mapped to both 1 and 3

0 is mapped to -3

1 is mapped to 4

3 is mapped to 1

Because -2 has more than one image, it disqualifies the mapping from being a function.

User Pranshu Verma
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