PLEASE HELP!!!!

Is this relation a function?

A) Yes, for the given x-values, there is one and only one y-value.
B) No, for the given x-values, there is one and only one y-value.
C) Yes, for the given x-values, there is more than one y-value.
D) No, for the given x-values, there is more than one y-value.

PLEASE HELP Is this relation a function A Yes for the given xvalues there is one and only one yvalue B No for the given xvalues there is one and only one yvalue class=