**IV. Special Graphs**

A. Piecewise Defined FunctionsA function such as the one below is called a piecewise function and can be entered in a TI-83 or a TI-84. However, it does require careful entry. Some of the key entries are defined in more detail on other pages. So, if you need more explanation, just follow the links.

Example: Graph the function . You will need to access the TEST menu by pressing . You will enter each part of the function in conjunction with the TEST menu. The parentheses are important. You should graph these functions in DOT mode so that the calculator does not attempt to connect two pieces that should not be connected.

TEST Menu
(2nd, MATH) |
Enter the function.
Put in DOT mode. |
Graph
using
ZDecimal. |
Graph using
ZStandard. |

Example: Graph the function .

TEST Menu

(2nd, MATH) Enter the function.

Put in DOT mode. Graph using

ZDecimal.

(Not good.) Graph using

ZStandard.