Question

give an example of a relation which is not a function

Answer 1

hey .
it's a copied answer (just being honest)
Hope it helps


A relation from a set X to a set Y is called afunction if each element of X is related to exactly one element in Y. That is, given an element x in X, there is only one element in Y that x is related to. For example, consider the following sets X and Y. ... It's still afunction, it's just not a one-to-one function.