Activity 1. A. B. Identify if the following is a function or does not represent a function 1. {(11,9), (5,7), (11,12), (5,8)} 2. {(5,9), (10,7), (2,12), (6,17)} 3. {(3,6), (4,9), (5,12), (13,4)} 4. {(0, 1), (1, 2), (2, 3), (3, 4)} 5. {(0, 1), (1, 0), (2, 3), (3, 2)} 6. {(0, 0), (1, 1), (2, 2), (3, 3)}, 7. {(0, 1), (1, 0), (2, 0), (3, 2)}​