If f of x is equal to 3 x and g of x is equal to 1 third x , which expression could be used to verify that g of x is the inverse of f of x ?

To verify that g is the inverse of f, substitute f(x) = 3x into g(x) = x/3. This gives g(f(x)) = (1/3)(3x) = x, so choice D, “1 third times 3x,” verifies the inverse relationship.

AI-written and checked against the verified answer.