Khan Academy
Khan Academy: Checking if a Table Represents a Function
By watching this video lesson, students will be able to look at a table and determine if Y is a function of X. [1:15]
Khan Academy
Khan Academy: Relations and Functions
Video tutorial explores how to determine if a relation given by a set of ordered pairs is a function. [6:56]
Khan Academy
Khan Academy: Testing if a Relationship Is a Function
Watch this video tutorial to determine if points on a graph represent a function. [2:22]