Algebraic Functions: Vertical Line Test

To be (a function) or not to be (a function). An easy-to-use interactive has pupils drag a vertical line onto several graphs to determine if they represent functions. Some challenge questions assess understanding of this idea.

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Instructional Ideas

  • Use the resource as a review tool
Classroom Considerations

  • Requires setting up a free CK-12 account to access the interactive
  • Learners should already have experience with vertical line tests

  • Directions are clear, so it requires minimal supervision/aid
  • Answers are computer-scored instantly

  • No tutorial or instructional material