To find the constant of proportionality, we can choose any pair of values and divide the y-coordinate by the x-coordinate.
For example, using the first two rows:
constant of proportionality = 4/16 = 1/4
Now we can use this constant to write the equation of the proportional relationship in the form y = kx, where k is the constant of proportionality:
y = (1/4)x
So the completed equation is:
y = (1/4)x