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Texas Instruments Titanium TI-89 User Manual

Texas Instruments Titanium TI-89
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Basic Function Graphing 309
From the Home Screen or a Program
From the Home Screen or a ProgramFrom the Home Screen or a Program
From the Home Screen or a Program
You can also define and evaluate a function from the Home screen or a program.
•Use the
Define and Graph commands. Refer to:
- “Graphing a Function Defined on the Home Screen” and “Graphing a Piecewise
Defined Function” in Additional Graphing Topics.
- “Overview of Entering a Function” in Programming.
Store an expression directly to a function variable. Refer to:
- “Storing and Recalling Variable Values” in Operating the Calculator.
- “Creating and Evaluating User-Defined Functions” in Calculator Home Screen.
Note: User-defined functions can have almost any name. However, if you want them to
appear in the Y= Editor, use function names
y1(x), y2(x), etc.
Selecting Functions to Graph
Selecting Functions to GraphSelecting Functions to Graph
Selecting Functions to Graph
Regardless of how many functions are defined in the Y= Editor, you can select the ones
you want to graph.
Selecting or Deselecting Functions
Selecting or Deselecting FunctionsSelecting or Deselecting Functions
Selecting or Deselecting Functions
Press 8# to display the Y= Editor.
A “Ÿ” indicates which functions will be graphed the next time you display the Graph
screen.

Table of Contents

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Texas Instruments Titanium TI-89 Specifications

General IconGeneral
Display TypeLCD
Display Resolution160 x 100 pixels
Memory188 KB RAM, 2.7 MB Flash ROM
TypeGraphing Calculator
DisplayMonochrome
ProcessorMotorola 68000
Processor Speed12 MHz
Power Source4 AAA batteries
ConnectivityUSB
ProgrammingTI-BASIC, Assembly
Operating SystemAMS (Advanced Mathematics Software)

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