Which relation is a function?{(1, 1), (-1, 2), (0, 3), (1, 4), (-2, 5)}{(-1, -1), (-1, -2), (-1, -3), (-1, -4), (-1, -5)}{(-3, -1), (-2, 0), (-1, 1), (0, 2), (1, 3)}{(-3, -3), (-2, -2), (-1, -1), (0, 0), (-1, 1)}