The two most common measures of temperature are Fahrenheit (F) and Celsius (C).
It is fairly common knowledge that water freezes at 32°F, or 0°C, and boils at 212°F,
or 100°C. Because there is a linearrelationship between the Fahrenheit and Celsius
temperature scales, using these two equivalences we can derive the familiar formulas
for converting from one temperature scale to the other, as seen in Section 3.3,
Exercises 93 – 100.
Graphs are widely used in the media because they present a great deal of
information in a concise form. In this chapter, we see how information such as the
relationship between the two temperature scales can be depicted by graphs.
Graphs, Linear Equations,
and Functions
3.1 The Rectangular
Coordinate System
3.2 The Slope of a Line
3.3 Linear Equations
3.4 Linear Inequalities in Two Variables
Summary Exercises
SUMMARY EXERCISES on Slopes and Equations of Lines
of Lines
3.4 Linear Inequalities
in Two Variables
3.5 Introduction
to Relations
and Functions
3.6 Function Notation and Linear Functions
and Linear
Functions
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CHAPTER