Texas Instruments Titanium TI-89 User Manual

Additional Graphing Topics 495
2. As necessary, use D and C to select the applicable function.
Note: To set the tangent point, you can also type its x value and press ¸.
Drawing a Line Based on a Point and a Slope
Drawing a Line Based on a Point and a SlopeDrawing a Line Based on a Point and a Slope
Drawing a Line Based on a Point and a Slope
To draw a line through a specified point with a specified slope, execute the
DrawSlp
command from the Home screen or a program. Use the syntax:
DrawSlp x, y, slope
You can also access DrawSlp from the Graph screen.
1. 2 ˆ
and select
6:DrawSlp. This switches to the Home screen and puts DrawSlp in the
entry line.
3. Move the cursor to the tangent point, and
press ¸.
The tangent line is drawn, and its
equation is displayed.
2. Complete the command, and press
¸.
The calculator automatically switches to
the
Graph screen and draws the line.
DrawSlp 4,0,6.37

Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)