Each table shows a proportional relationship between x and y. Match each table with its constant of proportionality.
x y

1 20

2 40

3 60

x y

2 80

8 320

12 480

x y

2 0.4

4 0.8

9 1.8

x y

7.5 4.5

10 6

17.5 10.5

0.6

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0.2

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20

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40

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Pls help:( HELP