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 domain of a function?

• The set of all Y values

• The set of all values

• The set of all X values

• The set of all Z values

How do you determine the domain of a graph?

• By looking at the highest and lowest Y values

• By identifying the points where the graph intersects the Y-axis

• By examining how far the graph extends on the X-axis

• By counting the number of points on the graph

What symbol is used to connect different parts of the domain?

• Multiplication symbol

• Union symbol

• Intersection symbol

• Addition symbol

What is the range of a function?

• The set of all values

• The set of all Z values

• The set of all Y values

• The set of all X values

How do you determine the range of a graph?

• By examining how far the graph extends on the Y-axis

• By looking at the highest and lowest X values

• By counting the number of points on the graph

• By identifying the points where the graph intersects the X-axis