Question

Question was provided via image upload.

Explanation:

Step1: Recall the vertical line test

A relation is a function if every vertical line intersects its graph at most once.

Step2: Check each graph

• Top - left: A vertical line would intersect at most once. So it could be a function.
• Top - right: A vertical line through the circle would intersect twice. Not a function.
• Bottom - left: A vertical line intersects at most once. Could be a function.
• Bottom - right: A vertical line intersects at most once. Could be a function.

(Assuming the question is to identify which is not a function, the top - right graph (the circle) fails the vertical line test. If the question is to identify functions, the top - left, bottom - left, bottom - right are functions.)

Answer:

(If identifying non - function: The Middle - Top Graph (the circle graph) is not a function. If identifying functions: The Top - Left Graph, The Bottom - Left Graph, The Bottom - Right Graph are functions.)