x’ = k(x – a) + a y’ = k(y – b) + b [P ,⅔] (1,-2) A(-5,13) A’(x’ y’) x’ = ⅔(-5 – 1) + 1 = -3 y’= ⅔(13 – (-2)) + (-2) = 8 Jadi koordinat titik A’(-3,8) 34