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

(A)

Step-by-step 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.

the answer would be A

Step-by-step explanation:

ummm seems that u didnt post the attachement !

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.