Question

use the vertical line test to determine if y is a function of x in the graph.

y is not a function of x
y is a function of x

Explanation:

Step1: Recall vertical line test rule

A graph represents a function if any vertical line drawn intersects the graph at most once.

Step2: Apply test to the given graph

For the provided linear graph, every vertical line will cross the line exactly one time, with no vertical line intersecting it more than once.

Answer:

y is a function of x