The constant of proportionality of the proportional relationship between x and y is: 1.3.
The constant of proportionality, k = y/x, of a proportional relationship.
To find the constant of proportionality of the relationship between x and y, select any given pair from the table, say, (2.5, 3.25).
Constant of proportionality (k) = 3.25/2.5
Constant of proportionality (k) = 1.3
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