Question

I WILL MARK BRAINLIEST
Which set of ordered pairs does NOT represent y as a function of x?
{(1, 1), (2, 1), (3, 1)}
{(1, 2), (1, 3), (1, 1)}
{(1, 1), (2, 2), (2, 3)}
{(1, 2), (2,3), (3,3)}

Answer 1

The second pair because it would practically be a vertical line.