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Chapter 4

# Graphing for the Good Life

In This Chapter

Getting situated with points, axes, coordinates, quadrants, symmetry, and intercepts

Graphing lines every which way but loose

Recognizing what you need when graphing polynomials, radicals, and absolute value equations

Becoming familiar with graphing calculator capabilities

A graph is a mathematical picture. In statistics or other topics that deal with numbers of things, you see bar graphs, scatter plots, line graphs, and so on. In algebra, you use graphs to represent all the sets of numbers that work in a particular equation. A graph is very useful — it gives you visual information right upfront. For instance, it can tell you how high or how low the points go. It can show you, quickly, if the graph represents points that spread all over the place or points that are limited in their scope.

In this chapter, you become familiar with the coordinate graphing system and its many facets. Your goal is to quickly graph equations, so in this chapter, you see how to use the characteristics of the different types of equations in order to ...

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