Introduction

Learning Outcomes

By the end of this chapter, you should be able to

• Interpret the relationships among data, graphs, and situations
• Determine the characteristics of the graphs of linear relations and functions, including
  • Intercepts
  • Domain
  • Range

• Use a graphing calculator to identify important characteristics of relations and functions
• Identify whether a given relation is a function

Unit Overview

In this unit, you will learn about the basics of graphing. You will learn how to graph and analyze a relation, identify certain characteristics of a graph such as domain and range, and determine whether a graph is a function. Throughout this unit, you will see that graphing has many practical real-world applications across various fields. Graphs can be used by meteorologists and farmers to track and predict weather conditions. City planners analyze graphs of traffic data to help optimize traffic light timings and design more efficient road systems. Graphs may also be created after elections to show vote distribution across regions.