Answer:
50 grams per egg is the constant of proportionality.
Explanation:
A constant of proportionality is when two variables have a constant ratio in their relationship, typically exhibiting a linear relationship.
The equation for the constant of proportionality can be written as y = kx, where k is your quantitative constant.
Let's plug in these values into our equation:
Y = 300 (we are given that)
X = 6 (we are given that)
K = ? (we are not given that)
So now, we have 300 = k(6).
We now want to solve for k.
To isolate the k variable, we must divide both sides of the equation by 6
This gives us:

300 divided by 6 = 50.
Therefore, our constant of proportionality is 50, meaning that the weight of each additional egg is 50 grams. In context, this means that if one egg were to be added, the weight of the total eggs would increase by 50 grams per egg. Hope this helped!