Khan Academy
Khan Academy: Algebra: Graphical Relations and Functions
Video determing whether the graph of a set of points is a function, which in this case it is not. Includes an overview of what a function is. Describes the vertical line test. [4:07]
Khan Academy
Khan Academy: Algebra: Relations and Functions
Video giving an overview of domain, range, relations, and function using mappings. Determines whether a specific set of ordered pairs is a function. [6:57]
Sophia Learning
Sophia: The Vertical Line Test
Students learn how to use the vertical line test to determine if a relation is a function. A video tutorial explores the algebra topic.
Khan Academy
Khan Academy: Algebra I Worked Examples: Testing if a Relationship Is a Function
The video resource shows worked examples of algebra concepts. Students watch a detailed problem on how to determine if the points on a graph represent a function. [2:23]
Khan Academy
Khan Academy: Algebra: Testing if a Relationship Is a Function
Video determining whether the graph of a set of points is a function, which in this case it is not. [2:22]