Algebra-1

Question Analysis
This question tests the student's understanding of the Vertical Line Test. The key is to recognize that if every vertical line intersects the graph at most once, it means each x-value corresponds to exactly one y-value, which is the definition of a function.

Key Concept Explanation
The Vertical Line Test is a graphical method to determine if a given graph represents a function. A graph represents a function if and only if every vertical line intersects the graph at most once.

Step-by-step Solution
1. Identify the condition: Every vertical line intersects the graph at most once.
2. Recall the ...