G = {(1, 0), (2, 3), (0, -1), (-1, -2)} Is G-1 a function and why/why not? Yes, no two ordered pairs in this list have the same second coordinate.
No, there is a limited number of ordered pairs in this list.
Yes, there is more than one ordered pair in this list.
No, each set of ordered pairs in this list has the same second coordinate.