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10. 2/10 = 0.2 or 0.20

11.  8/10 = 0.8 or 0.80

12. 5/10 = 0.5 or 0.50

13. 17/100 = 0.17

14. 89/100 = 0.89

15. 68/100 = 0.68

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

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step-by-step explanation:

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