It is also called as the constant of proportionality. It is also called as the constant of proportionality. *

constant of variation

Step-by-step explanation:

Constant of variation and constant of proportionality mean the same and they are used in variations.

For instance:

In the above equation, y varies directly as x and the constant of proportionality or variation is 2.

It is often represented with k (though, other alphabets can also be used)