Question

Which set of ordered pairs represents a function?

{(-6, -9), (-6,4),(-1,9), (5, -1)}
{(-8, -2), (7, -2),(-9,2), (0,0)
{(5,8), (9,7),(-3,-8),(5,-5)}
{(7,-8), (7, - 7), (8,4),(1, -3)}​

Answer 1

{(-6, -9), (-6,4),(-1,9), (5, -1)}

Step-by-step explanation:

because the x value is not repeated twice as it is in {(-8, -2), (7, -2),(-9,2), (0,0) {(5,8), (9,7),(-3,-8),(5,-5)} {(7,-8), (7, - 7), (8,4),(1, -3)}​

Answer 2

The second one is a function. {(-8, -2), (7, -2),(-9,2), (0,0)

Step-by-step explanation:

Its because the y-value is repeated twice.

Hope it helps.