Question

(04.01 LC)

Which of the sets of ordered pairs represents a function?

A = {(2, −2), (5, −5), (−2, 2), (−5, 5)}
B = {(4, 2), (4, −2), (9, 3), (9, −3)}

Only A
Only B
Both A and B
Neither A nor B

Answer 1

1,226 days late to answer this question but that will not stop me!

The answer is... drumroll please ... Only A :]

Answer 2

Only A

Explanation:

Let's remember the definition of a function:

A function is a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.

In A, each input has exactly one output so it's a function.

But in B, the inputs 4 and 9 have two different outputs, it can't represent a function.

The answer is only A.