Brainliest for correct awnser Which of the following lists of ordered pairs is a function?A.(1, 1), (2, 3), (1, 5), (4, 7)B.(0, 2), (4, 2), (0, –4), (4, –2)C.(2, 4), (3, 9), (4, 16), (5, 25)D.(2, 4), (–2, 4), (3, 9), (–2, –4)

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3