{(1, 2), (3, 6), (4, -7), (6, -10)} is this a function

Answer 1

Yes, {(1, 2), (3, 6), (4, -7), (6, -10)} is a function. In a function, each unique input value (x-value) corresponds to only one output value (y-value), and in this case, each x-value has only one corresponding y-value.