What is a function in Discrete Mathematics?

Answer: A. A binary relation where each first element is related to a unique second element — In Discrete Mathematics, a function is a binary relation where each element of the first set (Domain) is related to a unique element of the second set (Range).

1. A.

   A binary relation where each first element is related to a unique second element

2. B.

   A binary relation where each first element is related to many second elements

3. C.

   A binary relation where each second element is related to many first elements

4. D.

   A binary relation where each second element is related to a unique first element

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