Consider the list below and determine which of the relations are functions. 1. {(1, 3), (2, 3), (3, 3), (4,3)}
2. {(3, 0), (4, 1), (5,2), (4, -1 )}
3. {(-2,5), (-1, 2), (0, 1), (1, 2)}
4. {(-3, 7), (1, 4), (2, 9), (5,0)}
5. {(8, 1), (8, 2), (8, 3), (8,4)}
Part A: Use the corresponding numbers to tell which of the relations are functions. Select all that apply.
Part B: Select one of the relations from above that is NOT a function and explain how you know it is not.