Algebra-1

To find the constant of proportionality in a proportional relationship between two variables y and x, you can use the formula:  

 

Here's what each term represents:

k: The constant of proportionality.

y: The dependent variable.

x: The independent variable.

To find k, simply divide y by x. This gives you the rate at which y changes for each unit change in x.

 

Let's clarify the other options you mentioned:

B.