Texas Instruments TI-89 Titanium User Manual

Basic Function Graphing 322
2. As necessary, use D and C to select the function for the first point.
3. Set the first point. Either use A or B to move the cursor to the point or type its x
value.
4. Press ¸. A
+ marks the point.
5. If the second point is on a different function, use D and C to select the function.
6. Set the second point. (If you use the cursor to set the point, a line is drawn as you
move the cursor.)
Drawing a Tangent Line
1. From the
Graph screen, press ‡ and select A:Tangent.
2. As necessary, use D and C to select the applicable function.
Note: To erase a drawn tangent line, press † (ReGraph).
7. Press ¸.
The distance between the two points is
displayed, along with the connecting line.
3. Set the tangent point. Either move the
cursor to the point or type its x value.
4. Press ¸.
The tangent line is drawn, and its
equation is displayed.

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches