Algebra-1

Question Analysis
This question tests the student's understanding of the Vertical Line Test and its application in determining whether a graph represents a function.

Key Concept Explanation
The Vertical Line Test states that if any vertical line intersects the graph at more than one point, then the graph does not represent a function. If every vertical line intersects the graph at most once, then the graph is a function.

Step-by-step Solution
1. Understand the Vertical Line Test: A graph represents a function if every vertical line intersects the graph at most once.