The video tutorial explains the concepts of domain and range in graphs. It begins by introducing the domain as the set of all X values in a graph and discusses how there are infinite points within the domain. The tutorial emphasizes that the domain extends to both negative and positive infinity. It then shifts focus to the range, which is the set of all Y values, and explains that the range can also extend to infinity but may have an upper limit. The video concludes with an exercise for students to determine the domain and range of given graphs.

What does the domain of a graph represent?

• The set of all possible Y values

• The lowest point on the graph

• The set of all possible X values

• The highest point on the graph

How can you describe the domain of a graph that extends infinitely in both directions?

• From 0 to 10

• From negative infinity to 0

• From negative infinity to infinity

• From 0 to infinity

What is the range of a graph?

• The set of all possible X values

• The set of all possible Y values

• The distance between the highest and lowest points

• The number of points on the graph

If a graph's highest Y value is 2, what is the range?

• From 0 to 2

• From negative infinity to 2

• From negative infinity to 0

• From 2 to infinity

Which of the following is true about the range of a graph?

• It is always from 0 to infinity

• It is determined by the highest and lowest Y values

• It only includes positive values

• It is the same as the domain