Which relation is a function with range of {-1, 0, 1, 4}? A. {(1, 5), (-1, -2), (0, 3), (4, -7)}

B. {(5, 1), (-2, 0), (5, 4), (0, -1)}

C. {(-8, 0), (3, 4), (0, -1), (-2, 1)}

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

step-by-step explanation:

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