Question

Select Is a Function or Is not a Function to correctly classify each relation.

{(3, 7), (3, 6), (5, 4), (4,7)}

{(1, 5), (3, 5), (4, 6), (6,4)}

{(2, 3), (4, 2), (4, 6), (5,8)}

{(0, 4), (3, 2), (4, 2), (6,5)}