State whether each set of ordered pairs represents a function. SELECT ALL THAT APPLY a
{(10, 9), (-2, -16), (-6, 7), (5,8), (8,-16), (-11, 9)}

b
{(-7, 4), (-8, 3), (-7, 7),(-20, 8), (5,9), (3, 1), (2, 6)}

c
{(-2,-4),(-8, 3), (-7, -4), (-2, -4), (11,8), (9,-4)}

d
{(6.0), (-12, 0), (-6, 0), (20, 0)}

e
{(12.-18), (15, 1), (12,5), (0.9), (-5, -17)