Answer:
To find the constant of proportionality, you need to have two variables that are directly proportional to each other. This means that as one variable increases, the other variable increases in proportion to it.
Once you have identified two variables that are directly proportional, you can find the constant of proportionality by dividing one variable by the other.
For example, if you have two variables, x and y, and you know that they are directly proportional, you can write the equation:
y = kx
where k is the constant of proportionality.
To find the value of k, you can pick any set of values for x and y that satisfy the equation and solve for k. For example, if x = 2 and y = 4, you can write:
4 = k(2)
Solving for k, you get:
k = 4/2 = 2
So the constant of proportionality in this case is 2. This means that y is always twice as large as x, no matter what values of x and y you choose, as long as they are proportional.