Domain and range from a graph

The video tutorial explains the concepts of domain and range in functions. It begins by defining the domain as the set of all X values that make up a function and discusses how to determine the domain by considering the extent of the graph along the X-axis. The tutorial addresses discontinuities, such as holes, where X values are not defined. It then transitions to the range, defined as the set of all Y values, and explains how to identify the range by examining the graph's vertical extent. The video also covers set notation and the use of the union symbol to represent combined domains.

What is the definition of domain in the context of a function?

How do you determine the domain of a graph that extends to negative infinity?

What does it mean when an X value is not defined at a certain point on the graph?

Explain how to express the domain using set notation.

What is the range of the function based on the given graph?