Question

Is the following relation a function ? S = {(1,2),(2,2),(-2,2)} justify your answer

Answer 1

YES

Explanation:

relation is a function if we have y for every x from domain and for one x we have one and only one y

x = 1 --> y = 2

x = 2 --> y = 2

x = -2 --> y = 2

no x-es without y-es

and no two the same x-es with one y

so this relation is a function