Algebra-1

Question Analysis
This question tests the understanding of the vertical line test, a graphical method to determine if a graph represents a function.

Key Concept Explanation
The vertical line test states that if any vertical line drawn on a graph intersects the graph at more than one point, then the graph does not represent a function. This is because a function must have a unique output for each input.

Step-by-step Solution
1. Understand the vertical line test: Draw a vertical line at any position on the graph.
2. Observe the number of intersection points between the vertical line and the graph.
3. I...