8. Is this relation a function?

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

a) Yes

b) No

Yes

Step-by-step explanation:

The inputs in a function should have only one output. In other words, each x value should only be assigned to one y value.

For example, (-2, - 1), (1, 0), (1, 5), (2, 0) would not be a function because x value 1 is assigned to both number 0 and number 5.

In (1, 1) (2, 2) (3, 3) (4,4), non of the X values repeat themselves, so it IS a function.