Module 1  Describing Functions 
Introduction  Lesson 1  Lesson 2  Lesson 3  Lesson 4  SelfTest 
Introduction 
Have you heard of the Rule of Three? This rule says that functions should be described three ways: symbolically, graphically and numerically. As you investigate functions from each of these three perspectives and see how the three representations are connected, you will gain a deeper understanding of the important mathematical concept of function. The TI89 provides a platform to investigate functions in these three different ways. Lesson Index: 1.1  Basic Features 1.2  Describing Functions Symbolically 1.3  Describing Functions Graphically 1.4  Describing Functions Numerically After completing this module, you should be able to do the following:

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