Dictionary
search :       browse : 
A B C D E F G H I J K L M
  N O P Q R S T U V W X Y Z
         
Description
Related Terms
Everyday Examples
Interactive Checkpoint
More Information
Challenge
How to use this dictionary
Contact
 Description  
 Vertical Line Test:  A test used to determine if a relation is a function.
A relation is a function if there are no vertical lines that intersect the graph at more than one point.