Rearrange x = 7y - 5 to make y the subject.

By rearranging x = 7y - 5 to make y the subject, we get

x + 5 = 7y ( By transposition method )

or,

constant of proportionality = 3 and the equation is c = 3p.

step-by-step explanation:

c = kp   where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.

substituting the values given:

24 = 8k

k = 3.

the same value of k will be obtained if we substitute the other given values.