Question

Is this a function?
{(a,b),(c,d),(a,c,)}

Answer 1

ya

Answer 2

I would say no because you have two values of y (b&c) for one value of x (a)

Answer 3

thanks

Answer 4

I would concur with @alekos

Answer 5

thanks so much guys @alekos @zzr0ck3r