### Relations and Functions - Vertical Line Test and Function Notation

Using the vertical line test to determine if a graph represents a function. Why the vertical line test works. Since functions are introduced in this lesson, the introduction of function notation take place. Some students ask the question, why do we need another way to write and equation? There is an easy answer, an equation is a relation and may not be a function, thus we need a way to distinguish between a relation and a function in the form of an equation.

Length:
08:37