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Which relation is a function?

Which relation is a function?-example-1
Which relation is a function?-example-1
Which relation is a function?-example-2
Which relation is a function?-example-3
Which relation is a function?-example-4

1 Answer

3 votes

The number two is a function

First rule of function: for each element of A there is one and only one element of B

For example, in the first one -5 is "collegated" to -2 and 3. So this isn't a function.

Naturally, every element of B can have more element of A

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