The constant of proportionality in this proportional relationship is 9/7.
Direct variation
From the given table, you can see that as the value of x is increasing, the value of "y" is also increasing.
This shows that x is directly proportional to y.
If x = 2, y = 1 5/9
2 = (14/9)k
18 = 14k
k = 18/14
k = 9/7
Hence the constant of proportionality in this proportional relationship is 9/7.
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