Question: Could you please help verify if the answer is correct for the following question: Question: Give an example of a one-to-one function from the set

Could you please help verify if the answer is correct for the following question:

Question: Give an example of a one-to-one function from the set of integers to the set of positive integers.

Answer: f(x) = x + 1

I believe this answer is correct but it has been evaulated wrong on the test.

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