Which set of ordered pairs represents a function? {(9,8),(-1,7),(-1, -9), (3, -1)}
{(9,5),(4,6), (9,8),(-6,9)}
{(-8,0),(-8,2), (5, -7),(-2,-9)}
{(2,9),(-4,-6), (9,6), (0,6)}

{(2,9),(-4,-6), (9,6), (0,6)}

Step-by-step explanation:

A function has no repeating inputs (x-values) in a given set of ordered pairs.

The bottom set is a function. There are no repeating inputs in the given pairs.

All other sets have a repeating input; Therefore they are not functions.

{(9,8),(-1,7),(-1, -9), (3, -1)}

{(9,5),(4,6), (9,8),(-6,9)}

{(-8,0),(-8,2), (5, -7),(-2,-9)}

Brainilest Appreciated.

8y^50

step-by-step explanation:

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.