The TI 84 Plus CE is a newer version of the TI 84 Plus, with a thinner and lighter design compared to the TI 84 Plus. The CE model has a higher resolution color screen, making graphs and equations easier to read and understand. Additionally, the TI 84 Plus CE has more memory and a faster processor, allowing for quicker calculations and smoother performance compared to the TI 84 Plus. **

The main differences between the TI 84 Plus and the TI 84 Plus CE are in their design and features. The TI 84 Plus CE has a sleeker and thinner design compared to the TI 84 Plus. Additionally, the TI 84 Plus CE has a higher resolution color screen, which makes graphs and equations easier to read. The TI 84 Plus CE also has more memory and a faster processor, allowing for quicker calculations and smoother performance. **

To unlock your TI 84 Plus calculator, you can try resetting it by removing the batteries and then reinserting them after a few minutes. If that doesn't work, you can try pressing the "2nd" button followed by the "+" button and then the "7" button to access the memory menu. From there, you can select "Reset" to reset the calculator to its default settings. If these methods don't work, you may need to contact Texas Instruments customer support for further assistance. **

The TI-84 Plus calculator has a variety of games available for download, including puzzle games like Tetris and Block Dude, strategy games like Minesweeper and Snake, and classic arcade games like Pac-Man and Space Invaders. Additionally, there are educational games and math-related games designed to help students practice their skills in subjects like algebra, geometry, and calculus. Many of these games can be downloaded from online sources and transferred to the calculator using a USB cable or other compatible methods. **

There could be several reasons why your TI 84 Plus calculator is not graphing anymore. It could be due to a low battery, a malfunctioning screen, or a software issue. Try replacing the batteries to see if that resolves the issue. If the problem persists, you may need to reset the calculator or update its software. If none of these solutions work, it may be a hardware issue and you may need to contact the manufacturer for further assistance. **

To write a program for the TI-84 calculator, you will need to use the built-in programming language called TI-BASIC. You can access the programming interface by pressing the "PRGM" button on the calculator and then selecting "New" to create a new program. From there, you can use the programming commands and syntax to write your program, including variables, loops, conditionals, and other programming constructs. Once you have written your program, you can save it and run it from the program menu on the calculator. There are also resources available online and in the calculator's manual to help you learn TI-BASIC and write programs for the TI-84. **

To display fractions on the GTR TI-84, you can use the "MathPrint" mode. To access this mode, press the "Mode" button and select "MathPrint" from the list of options. Once in MathPrint mode, you can enter fractions using the division key ("/") or by using the template for fractions. The calculator will display the fractions in a more traditional format, making it easier to read and work with. **

To enter fractions on the TI 84 Plus calculator, you can use the "Math" key followed by the "1" key to access the "frac" function. This allows you to input fractions in the form of numerator/denominator. For example, to enter 3/4, you would press "Math" -> "1" -> "3" -> "/" -> "4". Alternatively, you can also use parentheses to input fractions, such as (3/4). **