1- do not answer unless 100% sure. 2 - be sure to explain how you got your answer. 3 - look at the image below for the question.

Choice D) No, it is a relation only




We can pass a single vertical line through more than one point on this red graph. So it fails the vertical line test making it not a function. Any given x value must produce exactly one y value

It is a relation since any relation is simply a set of (x,y) points. If you have enough points, you can connect the dots to form any shape you want (in this case, a sideways V)