**Graph**

To graph a function, press **MENU 3** to access
the equation editor and then enter the function. To immediately obtain a graph,
press **F5** to select DRAW. The resulting graph may have an unsatisfactory
appearance.

One
adjusts the graph view in one of two ways: zoom and window. To access the zoom
menu, press **F2** and then make your selection. A good starting point from
the zoom menu is to press **6** to access the QUICK selection menu. Select
accordingly whether you have a basic function of the type given, or press **7**
to select 7:Std, the standard viewing window. To adjust the window directly, press
**SHIFT V-Window**. A good starting point from
the View Window is to press **F3** to select STD, the standard viewing window.
The standard window extends from –10 to 10 on each axis. The standard view
settings are shown in the screen at right. In the View Window menu, one may adjust
the window to taste.

**Problem** When graphing trigonometric functions,
use radian mode unless directed to otherwise. Hence, if the graph of a trigonometric
function is not satisfactory, press **MENU 1**
to access the RUN-MAT screen. Then press **CTRL SETUP**
and set the Angle mode to Rad. Then, redo the graph. Wrong mode is easily the
most common problem in graphing a trigonometric function. For example, the graph
below left shows the graph of the sine function, degree mode, in the standard
viewing window. Clearly, the graph is not informative. For an informative graph
(below middle), press **F2** to access the ZOOM window, highlight B:QUICK,
press the right thumb pad arrow once to access the QUICK submenu, then press **2**
to select 2:Trig. To toggle the graph menu at the bottom of the screen off and
on, press **CTRL 0**.