Question

A student said that the relation{(-2,3),(4,4),(4,5),(5, -8)} is a function. Do you agree? Why or why not?

Answer 1

Explanation:

Disagree. (4, 4) and (4, 5) show that for a single input, 4, there are two distinct outputs (4 and 5). In a function no more than 1 output can be associated with a given input.

The given relation is not a function.