Final answer:
To rewrite the function (c = {2}/{2}) using function notation so that the dependent quantity C is a function of the independent quantity r, the correct function notation is (C = 2).
Step-by-step explanation:
To rewrite the function (c = {2}/{2}) using function notation so that the dependent quantity C is a function of the independent quantity r, we need to express the relationship in the form C = f(r), where f(r) is an equation involving r. By analyzing the given function, we can see that c is constant and does not depend on r. Therefore, the correct function notation is (C = 2).