Which Functions Pass the Vertical Line Test?!!

What is a function? Teachers have been asking pupils this question from the time they started their algebra careers. A helpful video walks through the process of using the vertical line test to determine a function while showing various graphical examples. 

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CCSS: Adaptable
Instructional Ideas

  • Use the video as an opening activity and then present problems for students to complete as a way to check for understanding
  • Assign the video as homework and check for understanding the next day
Classroom Considerations

  • Requires Internet access to watch or show the YouTube video
  • The second in a series of 29 lessons related to functions
Pros

  • Visuals and different colors allow the learner to see the difference between a graph that is a function and one that is not
  • Uses vocabulary and notation throughout the lesson
Cons

  • None
Common Core