What is the constant proportionality of weight is 1 pound and the price is 250 what is the constant proportionality for that?

The constant proportionality can be calculated by dividing the price by the weight. In this case, the constant proportionality would be:

Constant proportionality = Price / Weight
Constant proportionality = 250 / 1
Constant proportionality = 250

Therefore, the constant proportionality for a weight of 1 pound and a price of 250 is 250.