Help students clearly understand what makes a relation a function using the Vertical Line Test. This engaging, low-prep resource introduces the concept through clear notes, reinforces understanding with a practice worksheet, and builds confidence with a hands-on matching activity.

Students will analyze graphs, tables, and ordered pairs to determine whether a relation is a function, making this resource perfect for introducing or reinforcing functional thinking.

What’s Included

✔ Student Notes

• Clear explanation of functions vs. non-functions
  
• Visual explanation of the Vertical Line Test
  
• Worked examples and student-friendly language
  

✔ Worksheet (Practice)

• Identify functions using graphs
  
• Mix of function and non-function examples
  
• Ideal for independent practice or homework
  

✔ Matching Activity

• Students match representations (graphs and ordered pairs)
  
• Engaging, hands-on way to check understanding
  
• Great for centers, small groups, or early finishers
  

✔ Answer Keys

• Complete answer keys for all components
  

Skills Addressed

• Identifying functions
  
• Using the Vertical Line Test
  
• Interpreting graphs, tables, and ordered pairs
  
• Understanding input/output relationships