Step-by-step explanation:
The constant of proportionality is equal to the change in x/the change in y.
Change in x is equal to the second x value minus the first x value, and same for y.
Let's take (2,3), and (4,6).
The second x value is 4 and the first x value is 2. 4-2=2, so the change in x = 2
The second y value is 6 and the first y value is 3. 6-3=3, so the change in y = 3
Now that we know the change in x and the change in y, we can plug it in to our formula from before.
2 (change in x) ÷ 3 (change in y) is 2/3.
The constant of proportionality is 2/3.
