Hi, One completes the question(s) by simply substituting the value given for x k(x) = x + 18 k(0) = 0 + 18 = 18 k(-13) = -13 + 18 = 5 k(-5) = -5 + 18 = 13 k(6) = 6 + 18 = 24 k(b + 19) = (b+19) + 18 = b + 37