Question

Which relation is NOT a function?

A
{(a,x),(b,x),(d,z),(c,z)}

B
{(a,y),(b,y),(d,y),(c,y)}

C
{(a,x),(b,y),(a,w),(c,z)}

D
{(a,x),(b,y),(d,x),(c,z)}

Answer 1

B pretty sure hope this helps