Question

Which set of ordered pairs in the form of (x,y) does not represent a function of x?

Answer 1

A set of ordered pairs is not a function when there is more than one y value for an x coordinate. So the second choice is the answer because the last two points (1, 3.3), and (1, 4.5) gives the x coordinate 1 two y coordinates.

Answer 2

It's a function if every x is "matched" to ONLY ONE y. If the same value of x is matched with two different y's, then it isn't a function.

Answer 3

thanks