How proportionality constant values are defined?

[Warfare9x]

E

[Dash Lambda]

Some further context would be helpful.

 

A proportionality constant defines the relation between values which are connected by a proportion, so c in the equation y = cx. With definite sets of values for x and y, you just take corresponding values x₁ and y₁ and define c = y₁/x₁. If you have two random samples which are proportional to each other, then you find the proportionality constant through methods like linear regression.