To express the relationship between the weight of a ferret (y) and its length (x), you need a constant of proportionality, which we can denote as
In this equation:
represents the weight of the ferret. represents the length of the ferret. is the constant of proportionality.
If you have a specific value for the weight and length of a ferret, you can calculate
So, please provide a specific weight or length, or further details, if you want to calculate the constant of proportionality or complete the missing information.