Vertical Line Test Worksheet
A Grade 9 math worksheet covering the Vertical Line Test to determine if a relation is a function, with various practice problems.
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Vertical Line Test Worksheet
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Read each question carefully and follow the instructions. Use the Vertical Line Test to determine if the given relations are functions.
1. Which of the following best describes the Vertical Line Test?
A test to see if a line is vertical.
A test to determine if a relation is a function.
A test to find the slope of a vertical line.
A test for parallel lines.
2. If a vertical line intersects a graph at more than one point, the graph represents a function.
True
False
3. For each graph below, determine if it represents a function using the Vertical Line Test. Write 'Function' or 'Not a Function' in the space provided.
Graph A:
Graph B:
4. The Vertical Line Test states that if any vertical line intersects the graph of a relation at more than one point, then the relation is a function.
5. For a relation to be a function, each input (x-value) must correspond to exactly one (y-value).
6. Explain why the graph of x = y² is not a function using the concept of the Vertical Line Test.