Identifying Domain and Range in Discrete Graphs

This video tutorial explains how to find the domain and range from discrete graphs. It begins with an introduction to discrete graphs, which consist of distinct points rather than continuous curves. The tutorial then details the process of identifying the domain by listing all distinct x-values from left to right and the range by listing all distinct y-values from bottom to top. Two examples are provided to illustrate these concepts, demonstrating how to list the domain and range for specific graphs. The video concludes with a summary of the steps involved in finding the domain and range from discrete graphs.

What is a discrete graph?

• A graph with a bunch of points scattered around

• A graph with no points

• A graph with a continuous curve

• A graph with only one point

How do we list the domain and range from a discrete graph?

• As a set of distinct values

• As a continuous interval

• As a range of values

• As a single value

When identifying the domain, in which direction do we move across the graph?

• Bottom to top

• Right to left

• Top to bottom

• Left to right

What is the first x-coordinate value in the domain of the first example graph?

• 1

• 2

• Negative 1

• Negative 3

When identifying the range, in which direction do we move across the graph?

• Right to left

• Left to right

• Bottom to top

• Top to bottom

What is the first y-coordinate value in the range of the first example graph?

• Negative 2

• Negative 1

• 1

• 2

In the second example graph, what is the x-coordinate of the last point?

• 2

• 5

• 3

• 4

In the second example graph, what is the y-coordinate of the first point?

• 0

• Negative 1

• Negative 2

• Negative 3

What should you do to avoid counting any value more than once when listing the domain and range?

• List values multiple times

• List values in increasing order

• List values in random order

• List values in decreasing order

What will be discussed in the next video?

• Graphing inequalities

• Advanced graphing techniques

• Domain and range from continuous graphs

• How to draw discrete graphs