Answer:
Relationship between c and f is 7c - 3f = 0
Step-by-step explanation:
Since Clare has to use 9 cups each of them having 1/3 part filled with flour for making of 4 cakes.
Implies that 4 cakes require 28/3 cups of flour.
So 1 cake will require 28/4 x 3 cups of flour.
And c cakes will require 28c/12 cups of flour.
Hence according to the question
28c/12 = f
⇒ 28c = 12f
⇒ 7c = 3f
⇒ 7c - 3f = 0 is required equation.