Question

Which of the following relations is a function?

Answer 1

A function will NOT have any repeating x values, it can have repeating y values, just not the x ones. So which set has NO repeating x values ?
That would be { (1,3), (2,3), (4,3), (9,3)}....like I said, there can be repeating y values....just not the x ones. All of ur other answer choices have repeating x values.