Answer:
YES
Step-by-step 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
