Question

can u say the following is a function.is it one to one or onto or both
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Answer 1

A function f : A → B is one-to-one if for each b ∈ B there is at most one a ∈ A with f(a) = b. It is onto if for each b ∈ B there is at least one a ∈ A with f(a) = b.

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Answer 2

Answer:

Yes, the following is a function as all the elements of set A has an image in set B.

However, it is not an 'onto function' because not all the elements of set B are paired with set A.