Question

Which of the following diagram represents a relation that is NOT a function?​

Answer 1

The answer is A this represents a relation that’s not a function

Answer 2

The answer to your question is A) the first mapping. A function is a relation in which each and every element of X i.e. domain has a unique image in Y i.e. co-domain, because in the first mapping, element 2 is mapped to -3 and 5.