Question 14 (4 points) The function f:RT - R* defined as f(x) =3x- is O only injective (one-to-one) only surjective (onto) O bijective (one-to-one correspondence) O none of the above Question 15 (4 points) The function f:Z - Z defined as f(x) = Lx+ 1] is O only injective (one-to-one) only surjective (onto) O bijective (one-to-one correspondence) Onone of the above