Which set of ordered pairs does NOT represent a function?

{(-9, -3), (-4, -2), (-1, -1), (-1, 1)}

The set of the ordered pairs eight comma negative three, five comma negative one, two comma one, and negative one comma three.

The set of the ordered pairs thirty-three comma twenty-two, twenty-two comma eleven, eleven comma zero, and negative eleven comma negative twenty-two.

The set of the ordered pairs fifteen comma five, twenty comma four, twenty-five comma three, and thirty comma two.

Question

Which set of ordered pairs does NOT represent a function?

 {(-9, -3), (-4, -2), (-1, -1), (-1, 1)}

 The set of the ordered pairs eight comma negative three, five comma negative one, two comma one, and negative one comma three.

 The set of the ordered pairs thirty-three comma twenty-two, twenty-two comma eleven, eleven comma zero, and negative eleven comma negative twenty-two.

 The set of the ordered pairs fifteen comma five, twenty comma four, twenty-five comma three, and thirty comma two.

campbell_st · Answer

find the set where different x values go to the same y value... 

that's the one that's not a function

anonymous · Answer

??? i still dont get it im not good at this could you explain?