If y = 5x - 4, which of the following sets represents possible inputs and outputs of the function, represented as ordered pairs?
{(0.-4), (2,6). (4. 20)}
{(0.-4), (2,6), (4, 16)}
{(0,4), (2,6), (4.16)
{(0,4), (2.-6), (4, 20)}