is 20 correct and how do i do 21?

R A S delete 1 20 The graph of y = f(x) is shown below. Use this space for computations, return Shift BI .0 Which point could be used to find f(2)? (1) A (3) C (2) B (4) D 21) A sunflower is 3 inches tall at week 0 and grows 2 inches each week. Which function(s) shown below can be used to determine the height, f(n), of the sunflower in n weeks? I. f(n) = 2n + 3 II. f(n) = 2n + 3(n - 1) III. f(n) = f(n - 1) + 2 where f(0) = 3 (1) I and II (3) III, only (2) II, only (4) I and III Algebra