Question

Which set of ordered pairs represents a function?

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

Answer 1

the answer is A or the first one

Explanation:

this is because the "x" cannot have the same number. As you can see, all the other pairs have two numbers that are the same in the "x" spot. So this concludes that the top one is the answer. Sorry for the bad explanation.