# Ti-84 Plus Graphing Calculator For Dummies

Published: 06-17-2013

Get up-to-speed on the functionality of your TI-84 Plus calculator

Completely revised to cover the latest updates to the TI-84 Plus calculators, this bestselling guide will help you become the most savvy TI-84 Plus user in the classroom! Exploring the standard device, the updated device with USB plug and upgraded memory (the TI-84 Plus Silver Edition), and the upcoming color screen device, this book provides you with clear, understandable coverage of the TI-84's updated operating system.

• Details the new apps that are available for download to the calculator via the USB cable
• Walks you through menus and basic arithmetic
• Addresses graphing and analyzing functions as well as probability and statistics functions
• Explains how to use the calculator for geometry
• Reviews communicating with PCs and other calculators

TI-84 Plus Graphic Calculator For Dummies, 2nd Edition is the perfect solution for getting comfortable with the new line of TI-84 calculators!

## Articles From Ti-84 Plus Graphing Calculator For Dummies

148 results
148 results
Convert Degrees to Radians with the TI-84 Plus Calculator

Article / Updated 01-27-2022

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10 Common Errors when Using the TI-84 Plus Calculator

Step by Step / Updated 01-26-2022

Even the best calculating machine is only as good as its input. This list identifies ten common errors made when using the TI-84 Plus calculator. Wouldn’t it be great to avoid some of the common errors that normally plague students who are using calculators?

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Store Variables with the TI-84 Plus Calculator

Article / Updated 01-25-2022

The letters STO may look like texting language, but the TI-84 Plus calculator's STO key is a handy feature to have around. If you plan to use the same number many times when evaluating arithmetic expressions, consider storing that number in a variable. To do so, follow these steps: If necessary, press [2nd][MODE] to enter the Home screen. Enter the number you want to store in a variable. You can store a number or an arithmetic expression. Press The result of this action is shown in the first screen. Press [ALPHA] and press the key corresponding to the letter of the variable in which you want to store the number. The letters used for storing variables are the letters of the alphabet and the Greek letter theta. Press [ENTER] to store the value. This is illustrated in the second screen. Insert your stored variable into an expression After you have stored a number in a variable, you can insert that number into an expression. To do so, place the cursor where you want the number to appear, press [ALPHA], and press the key corresponding to the letter of the variable in which the number is stored. See the third screen. The number you store in a variable remains stored in that variable until you or the calculator stores a new number in that variable. Because the calculator uses the letters X, T, and the Greek theta when graphing functions, parametric equations, and polar equations, it is possible that the calculator will change the value stored in these variables when the calculator is in graphing mode. For example, if you store a number in the variable X and ask the calculator to find the zero of the graphed function X2, the calculator will replace the number stored in X with 0, the zero of X2. So avoid storing values in these three variables if you want that value to remain stored in that variable after you have graphed functions, parametric equations, or polar equations.

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How to Graph Functions on the TI-84 Plus

Article / Updated 01-25-2022

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How to Enter Functions on the TI-84 Plus

Article / Updated 01-25-2022

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TI-84 Plus C Graphing Calculator For Dummies Cheat Sheet

Cheat Sheet / Updated 01-21-2022

The TI-84 Plus C graphing calculator is one of the most popular calculators in the world. Find out the important keystrokes you need to know to use the TI-84 Plus, and learn the math functions and constants that the TI-84 Plus C makes available to you. Get to know the basics of graphing on your TI-84 Plus C, as well as how to use the calculator’s zoom commands and special menus.

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How to Find Standard Deviation on the TI-84 Graphing Calculator

Video / Updated 11-19-2018

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How to Enable and Disable the TI-TestGuard App on a Class Set of TI-84 Plus Calculators

Video / Updated 03-28-2016

The TI-TestGuard app permits educators to control their students' calculators in a testing environment. This video shows you how to use the TI-TestGuard app to enable and disable test mode on a class set of TI-84's.

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How to Store a Picture on the TI-84 Plus

Video / Updated 03-28-2016

Discover how to store a pic on the TI-84 Plus. A pic is a screenshot of the graph screen as opposed to an image -- which is a photo that can be used as a background to a graph. By storing a pic, you can graph more than 10 functions on a graph!

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How to Download and Install the TI-TestGuard App on the TI-84 Plus

Video / Updated 03-28-2016

Many end-of-course exams require that calculators be put in "exam" mode. On the TI-84 Plus C (or any of the TI-83 or TI-84 families of calculators), the best way to accomplish this is by using the TI-TestGuard app. The name of the app has changed (it used to be called Press-to-Test), and the functionality has improved. You might find it difficult to follow instructions written in the downloadable manual; hopefully this video will simplify the process a bit for you.

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