Answer: {(-8, -14), (-7,-12), (-6,-10), (-5,-8)}
Explanation: A function is a relation in which each x-coordinate corresponds to exactly one y-coordinate.
In the relations show here, notice that the first set
of ordered pairs is the only set where each x-coordinate
appears once with a different y-coordinate.
In the other ordered pairs, there is an x-coordinate that appears more
than once and it corresponds to a different y-coordinate.
For example, in the second relation,
the x-coordinate -9 appears twice.
In one case, -9 corresponds to -12 and
in the other case, it corresponds to -8.
So, this is not a function.