Tool:
Vertical Line Test 
Screenshot:

Go to: 
http://www.shodor.org/interactivate/activities/VerticalLineTest/
(opens a new window)

Description: 
This activity allows users to attempt to build functions, curves that pass the vertical line test. Students roll dice to create 5 points, then they try to connect the 5 points to create a function. If it is not possible, they click on Not possible, and get feedback. If it is a function, the applet says, "Your graph passes the vertical line test." It is easy to reset and then get five new points. There are some exploration questions that can be found under "What". 
Technology Type: 
Java Applet  
Author: 
Shodor: Project Interactivate 
Language: 
English  
Cost: 
Does not require payment for use 

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Lesson Plans: 
Functions and the Vertical Line Test 

Graphs and Functions 

Introduction to Functions 

Impossible Graphs 
Support Materials: 
Impossible Graphs Dialogue 

Functions and the Vertical Line Test Dialogue 
Tools: 
Number Cruncher 

Possible or Not? 

Whole Number Cruncher 
Courses: 
Math 7 
Domain & range 
 Algebra 
Vertical Line Test 
