Question

Which relation describes a function? What makes it a function?

Answer 1

D)  

{(-2,3),(-3,3),(-4,3)} Each member of the domain is assigned exactly one member of the range

Answer 2

D) {(-2,3),(-3,3),(-4,3)} Each member of the domain is assigned exactly one member of the range.
The domain must have only one value for y (range), unlike in the other 3 answer choices. If any section of a graph has two different y-values for the same x, then it is not a function.