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 TI-83 and TI-83 Plus provides platforms to investigate functions in these three different ways.

Lesson Index:

1.1 - Describing Functions Symbolically

1.2 - Describing Functions Graphically

1.3 - Describing Functions Numerically

After completing this module, you should be able to do the following:

• Define and evaluate a function on the TI-83 Plus or TI-83
• Use the method of "Guess and Check" to find a root (or zero) of a function
• Display a function graphically
• Use the table feature to describe a function numerically
• Find roots (or zeros) symbolically, graphically and numerically