Which of the following sets of ordered pairs could represent a function? Select all that apply. (3 points)
{(2,-5),(4,-5),(6,2),(8,3)}
{(-1,5),(3,5),(6,5),(9,5)}
{(3,-4),(5,2),(3,8),(6,7)}
{(0,3),(4,2),(-1,7),(0,3)}
{(-1,1),(-1,6),(-1,8),(-1,0)}
{(-4,2),(3,-2),(-4,-2),(5,1)}