{(3,1), (-3,1), (4, 3), (-4,3)}this one is function
{(3,3), (-2,-2), (0, 0), (-4,4)}this one is function
{(1,4), (2,4), (3, 4), (4,4)this ones a function}
{(3,1), (3,2), (3, 3), (3,4)} not a function
{(3,1), (3,3), (3, 2), (2,3)}not a function
HOPE THIS HELPS
mark brainliest if helpful