Which statement correctly describes the vertical line test?

• A. If any vertical line intersects a graph more than once, the graph represents a function
• B. If every vertical line intersects a graph at most once, the graph represents a function
• C. A vertical line test is used to determine the slope of a linear equation
• D. If any vertical line intersects a graph at exactly one point, the graph represents a relation but not a function

Answer: (B)