Is (5, 10), (-8, 3), (-1, 7), (-5, 10) A Function?

Step-by-step explanation:

Notice that the inputs {5, - 8, - 1, - 5} are all different. So we can immediately conclude that this is a function.

If the inputs were {5, - 8, - 1, 5}, this would not be a function, as the same input value (5) would result in two different outputs.