Question

PLEASE ANSWER THIS

Which relation is a function?

the x and y rows are separated


A. x y

4 -2

5 -3

6 -2

7 -2



B. x y

3 10

2 20

3 30

4 40



C. x y

-5 2

-5 3

-10 4

-10 5



D. x y

10 15

20 25

8 30

20 35

Answer 1

the answer would be A

Explanation:

Answer 2

(A)

Explanation:

In a function, each value of X is related to ONE y value.

To identify a function, check if the x values repeat. If they do not, then the relation is a function.

Answer A's domain is [4,5,6,7]. The x values do not repeat, so A is a function.

B, C, and D all have repeating x values in the domain.