Question

Which relation is also a function?

{(-1, 3), (0, 2), (3, -1), (3, 2)} {(2,-4), (2,-2), (2, 1), (2, 3)}
{(0, 3), (1, 2), (1, 4), (2.1)}
{(-4,-3), (0.-3). (1, -3), (4, -3)}

Answer 1

The second one.

Explanation:

A function can have two of the same inputs, but not two of the same outputs.

In the first one, the output 2 is found more than once.

In the third one, the output -3, is also found more than once.

The second one has completely unique numbers for both the input and output.

Answer 2

{(-4,-3), (0, -3,) (1, -3), and (4,-3)}

Explanation:

There can only be one y- output for each x-input. Every other answer is a relation because there are multiple y-values for an x-value.