Texas Instruments TI-73 Explorer Quick start guide

TI-73 / TI 83 Plus

Guess My Coefficients

Getting Started

Starting and Quitting the Application

How To…

Use On-Screen Options and Menus

Change Game Options

Select a Game

Enter Coefficients and Constants

Use Hints

More Information

Getting Help

Error Recovery

TI-73 / TI-83 Plus Guess My Coefficients App Page 2

Important Information

Texas Instruments makes no warranty, either expressed or

implied, including but not limited to any implied warranties of

merchantability and fitness for a particular purpose, regarding

any programs or book materials and makes such materials

available solely on an "as-is" basis.

In no event shall Texas Instruments be liable to anyone for

special, collateral, incidental, or consequential damages in

connection with or arising out of the purchase or use of these

materials, and the sole and exclusive liability of Texas

Instruments, regardless of the form of action, shall not exceed

any applicable purchase price of this item or material. Moreover,

Texas Instruments shall not be liable for any claim of any kind

whatsoever against the use of these materials by any other

party.

Graphing product applications (Apps) are licensed. See the

terms of the license agreement for this product.

Microsoft, Windows, Windows NT, Apple, and Macintosh are trademarks of their

respective owners.

TI-73 / TI-83 Plus Guess My Coefficients App Page 3

What Is the Guess My Coefficients

Application?

The Guess My Coefficients application familiarizes you with

various forms of linear, quadratic, and absolute value functions.

You determine the coefficients and constants (value such as

roots and intercepts) for a function by viewing the graph of the

function. If you need help, a HINT option shows points on the

graph and lets you trace the graph.

The Guess My Coefficients application is a concept application

that TI wants to share with our customers, educators, and

students before the product definition and testing are complete. It

is an alpha software version, and as such, it may contain

imperfections, or the coding may be incomplete.

TI invites your feedback concerning the functionality and

educational value of the Guess My Coefficients application.

Please send your comments and questions to

concept@list.ti.com.

TI-73 / TI-83 Plus Guess My Coefficients App Page 4

What You Need

Note In this guidebook, any information that pertains to the TI-83 Plus also

pertains to the TI-83 Plus Silver Edition, unless otherwise noted.

Hardware and Software Note

TI-73 with version 1.60 or latest version

of the Graph Explorer software

—or—

TI-83 Plus or TI-83 Plus Silver Edition

with version 1.15 or latest version of

the operating system (OS) software

You can download a free copy of

the latest Graph Explorer or

operating system software from

education.ti.com/softwareupdates.

Follow the link to Operating

Systems.

Computer with Microsoft ® Windows®

95/98/2000, Windows NT®, or Apple®

MacIntosh® OS 7.1 or higher installed

TI-GRAPH LINK™ computer-to-device

cable If you do not have this cable, call

your distributor or order the cable

from the TI on-line store.

TI Connect™ software, which works

with most supported models of Flash-

based TI graphing devices.

—or—

TI-GRAPH LINK software that is

compatible with the TI-73 or the

TI-83 Plus

You can download free copies of

TI Connect and TI-GRAPH LINK

software from

education.ti.com/softwareupdates.

Follow the link to Connectivity

Software.

TI-73 / TI-83 Plus Guess My Coefficients App Page 5

Where to Find Installation Instructions

Detailed instructions on installing this and other applications are

available at education.ti.com/guides. Follow the link to Flash

Installation Instructions.

Getting Help

The instructions in this guidebook are only for this application. If

you need help using the TI-73 or TI-83 Plus, refer to its

comprehensive guidebook at education.ti.com/guides.

For this application, help is available for each game from the

SELECT A GAME and OPTIONS screens, and from each SELECT A

FUNCTION screen.

1. Select HELP to display the HELP screen.

2. Press }and †to scroll through the help text.

3. Select BACK to leave the HELP screen and return to the

previous screen.

TI-73 / TI-83 Plus Guess My Coefficients App Page 6

Starting and uitting the Application

Starting the Application

1. Press Œto display the list of applications on your TI-73 or

TI-83 Plus.

2. Select GuesCoef. The application’s information screen is

displayed.

3. Press any key to continue. The programmer’s screen is

displayed.

4. Press any key to continue. The SELECT A GAME menu is

displayed.

Quitting the Application

From the SELECT A GAME screen, select QUIT (press o) or press

y 5.

TI-73 / TI-83 Plus Guess My Coefficients App Page 7

Navigating within the Application

Selecting Menu Items

You can select menu items in the following ways:

•Press }or †to highlight the menu item, and then press

Íto select it.

•Press the number key that corresponds to the menu item.

Using On-Screen Options

Each screen displays one or more options along the bottom of

the screen. To select an option, press the graphing key directly

below the option.

For example,

press sto

select HELP.

TI-73 / TI-83 Plus Guess My Coefficients App Page 8

Setting Game Options

You can set three different options for the games. The options

that you select apply to every function type (game) on the

SELECT A GAME screen.

Option Description

Fixed Number

of Problems The game consists of the defined number of problems

displayed on the right side of the screen, no matter how many

incorrect answers you give. When this option is not selected,

you play the game until you have given three incorrect

answers.

Give One

Retry You have two chances per problem to input the correct

answer.

Show Grid Displays the grid with the graph of the function.

1. From the SELECT A GAME screen, select OPTIONS to display

the GAME OPTIONS screen.

2. Press }or †to highlight an option.

Number of problems box

TI-73 / TI-83 Plus Guess My Coefficients App Page 9

3. Select Ÿor press Íto toggle the checkboxes.

4. Select BACK to confirm your changes and return to the

SELECT A GAME screen.

Changing the Number of Problems

1. On the GAME OPTIONS scree, press }or †to highlight the

number of problems box and then press Í.

2. Enter the number of problems (1-99) and then press Í.

Tip If you make a mistake when you enter the number of problems,

you can correct this in one of the following ways:

•Press ‘to delete the entire number.

•Press |to delete the last digit of the number.

Press Íto confirm your changes or y5to discard.

3. Select BACK to confirm your changes and return to the

SELECT A GAME screen.

TI-73 / TI-83 Plus Guess My Coefficients App Page 10

Selecting a Game

1. Select the function type to play from the SELECT A GAME

screen.

2. Select a function form from the SELECT A FUNCTION screen to

start the game.

The following function forms are available:

Function Type Form

Linear y = mx + b

ax + by = c

Quadratic y = a·x² + k

y = a·(x – h)² + k

y = a·(x – r)(x – s)

Absolute Value y = a·|x| + k

y = a·|x – h| + k

Tip You can also play the game with multiple function types instead of

just one type. From the SELECT A GAME screen, select ALL or

LINEAR & QUADRATIC or from the function-specific screens, select

BOTH / ALL FORMS.

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