Answer:
Choice 4/D; {(-8, 6), (-8, 5), (-9, 4), (-5, 3)}
Step-by-step explanation
Function: A set of ordered pairs that dont have any repeated x-values
When looking at the choices, look for which pairs have a shared x-value. if they share, they are NOT a function.
{(-9, -7), (-8, -7), (8, 2), (9, -5)}
{(6, 0), (-9, 5), (1, -5), (0, 0)}
{(4, 6), (6, 8), (3, 2), (-6, 8)}
{(-8, 6), (-8, 5), (-9, 4), (-5, 3)}
{(-8, 6), (-8, 5), (-9, 4), (-5, 3)} has one repeating x-value, -8, signifying that the set of ordered pairs is NOT a function.
