Texas Instruments -84 Plus Manual

TI-84 Plus
TI-84 Plus Silver Edition
Guidebook

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Important Information
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Important Information
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to any implied warranties of merchantability and fitness for a particular purpose,
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© 2005 Texas Instruments Incorporated
Windows and Macintosh are trademarks of their respective owners.

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USA FCC Information Concerning Radio Frequency
USA FCC Information Concerning Radio FrequencyUSA FCC Information Concerning Radio Frequency
USA FCC Information Concerning Radio Frequency
Interference
InterferenceInterference
Interference
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation.
If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, you can try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/television technician for help.
Caution: Any changes or modifications to this equipment not expressly approved
by Texas Instruments may void your authority to operate the equipment.

Chapter 1: Operating the TI-84 Plus Silver Edition 1
Chapter 1:
Chapter 1:Chapter 1:
Chapter 1:
Operating the TI-84 Plus Silver Edition
Operating the TI-84 Plus Silver EditionOperating the TI-84 Plus Silver Edition
Operating the TI-84 Plus Silver Edition
Documentation Conventions
Documentation ConventionsDocumentation Conventions
Documentation Conventions
In the body of this guidebook, TI-84 Plus refers to the TI-84 Plus Silver Edition.
Sometimes, as in Chapter 19, the full name TI-84 Plus Silver Edition is used to
distinguish it from the TI-84 Plus.
All the instructions and examples in this guidebook also work for the TI-84 Plus. All the
functions of the TI-84 Plus Silver Edition and the TI-84 Plus are the same. The two
graphing calculators differ only in available RAM memory, interchangeable faceplates,
and Flash application ROM memory.
TI-84 Plus Keyboard
TI-84 Plus KeyboardTI-84 Plus Keyboard
TI-84 Plus Keyboard
Generally, the keyboard is divided into these zones: graphing keys, editing keys,
advanced function keys, and scientific calculator keys.
Keyboard Zones
Keyboard ZonesKeyboard Zones
Keyboard Zones
Graphing — Graphing keys access the interactive graphing features.
Editing — Editing keys allow you to edit expressions and values.
Advanced — Advanced function keys display menus that access the advanced
functions.

Chapter 1: Operating the TI-84 Plus Silver Edition 2
Scientific — Scientific calculator keys access the capabilities of a standard scientific
calculator.
TI-84 Plus
TI-84 PlusTI-84 Plus
TI-84 Plus
G
raphing Keys
Editing Keys
Advanced
Function Keys
Scientific
Calculator Keys

Chapter 1: Operating the TI-84 Plus Silver Edition 3
Using the Color
Using the ColorUsing the Color
Using the Color.
..
.Coded Keyboard
Coded KeyboardCoded Keyboard
Coded Keyboard
The keys on the TI-84 Plus are color-coded to help you easily locate the key you need.
The light colored keys are the number keys. The light gray keys along the right side of the
keyboard are the common math functions. The light gray keys across the top set up and
display graphs. The Œkey with the purple lettering provides access to applications such
as the Inequality Graphing application.
The primary function of each key is printed on the keys. For example, when you press
, the MATH menu is displayed.
Using the
Using theUsing the
Using the yand
andand
and ƒKeys
KeysKeys
Keys
The secondary function of each key is printed in blue above the key. When you press the
blue ykey, the character, abbreviation, or word printed in blue above the other keys
becomes active for the next keystroke. For example, when you press yand then
, the TEST menu is displayed. This guidebook describes this keystroke combination
as y:.
The alpha function of each key is printed in green above the key. When you press the
green ƒkey, the alpha character printed in green above the other keys becomes
active for the next keystroke. For example, when you press ƒand then , the
letter Ais entered. This guidebook describes this keystroke combination as ƒ[A].

Chapter 1: Operating the TI-84 Plus Silver Edition 4
Turning On and Turning Off the TI-84 Plus
Turning On and Turning Off the TI-84 PlusTurning On and Turning Off the TI-84 Plus
Turning On and Turning Off the TI-84 Plus
Turning On the Graphing Calculator
Turning On the Graphing CalculatorTurning On the Graphing Calculator
Turning On the Graphing Calculator
To turn on the TI-84 Plus, press É.
• If you previously had turned off the graphing calculator by pressing yM, the
TI-84 Plus displays the home screen as it was when you last used it and clears any
error.
The ykey
accesses the
second function
printed in blue
above each key.
The ƒkey
accesses the alpha
function printed in
green above each
key.

Chapter 1: Operating the TI-84 Plus Silver Edition 5
• If Automatic Power Down™ (APD™) had previously turned off the graphing
calculator, the TI-84 Plus will return exactly as you left it, including the display, cursor,
and any error.
• If the TI-84 Plus is turned off and connected to another graphing calculator or
personal computer, any communication activity will “wake up” the TI-84 Plus.
To prolong the life of the batteries, APD turns off the TI-84 Plus automatically after about
five minutes without any activity.
Turning Off the Graphing Calculator
Turning Off the Graphing CalculatorTurning Off the Graphing Calculator
Turning Off the Graphing Calculator
To turn off the TI-84 Plus manually, press y M.
• All settings and memory contents are retained by Constant Memory™.
• Any error condition is cleared.
Batteries
BatteriesBatteries
Batteries
The TI-84 Plus uses five batteries: four AAA alkaline batteries and one SR44SW or 303
silver oxide backup battery. The silver oxide battery provides auxiliary power to retain
memory while you replace the AAA batteries. To replace batteries without losing any
information stored in memory, follow the steps in Appendix C.

Chapter 1: Operating the TI-84 Plus Silver Edition 6
Setting the Display Contrast
Setting the Display ContrastSetting the Display Contrast
Setting the Display Contrast
Adjusting the Display Contrast
Adjusting the Display ContrastAdjusting the Display Contrast
Adjusting the Display Contrast
You can adjust the display contrast to suit your viewing angle and lighting conditions. As
you change the contrast setting, a number from 0 (lightest) to 9 (darkest) in the top-right
corner indicates the current level. You may not be able to see the number if contrast is too
light or too dark.
Note: The TI-84 Plus has 40 contrast settings, so each number 0 through 9 represents
four settings.
The TI-84 Plus retains the contrast setting in memory when it is turned off.
To adjust the contrast, follow these steps.
1. Press and release the ykey.
2. Press and hold †or }, which are below and above the contrast symbol (blue, half-
shaded circle).
•†lightens the screen.
•}darkens the screen.
Note: If you adjust the contrast setting to 0, the display may become completely blank. To
restore the screen, press and release y, and then press and hold }until the display
reappears.

Chapter 1: Operating the TI-84 Plus Silver Edition 7
When to Replace Batteries
When to Replace BatteriesWhen to Replace Batteries
When to Replace Batteries
When the batteries are low, a low-battery message is displayed when you turn on the
graphing calculator.
To replace the batteries without losing any information in memory, follow the steps in
Appendix C.
Generally, the graphing calculator will continue to operate for one or two weeks after the
low-battery message is first displayed. After this period, the TI-84 Plus will turn off
automatically and the unit will not operate. Batteries must be replaced. All memory
should be retained.
Note: The operating period following the first low-battery message could be longer than
two weeks if you use the graphing calculator infrequently.
The Display
The DisplayThe Display
The Display
Types of Displays
Types of DisplaysTypes of Displays
Types of Displays
The TI-84 Plus displays both text and graphs. Chapter 3 describes graphs. Chapter 9
describes how the TI-84 Plus can display a horizontally or vertically split screen to show
graphs and text simultaneously.
Home Screen
Home ScreenHome Screen
Home Screen
The home screen is the primary screen of the TI-84 Plus. On this screen, enter
instructions to execute and expressions to evaluate. The answers are displayed on the
same screen.