Average Rating: 
Rating:  - A Highly Useful Calculator
I bought the TI-83 PLUS during my high school freshmen year. I bought it because we needed for Geometry. As a sophmore, I found this calculator to be a very useful tool as I continue to use it! I use it for algebra II AND chemistry -- plus, like they said, it's upgradable. Of course, I don't know ALL the functions of this calculator, but it's very useful nevertheless. It has a great keypad, a ton of functions, and it's easy to change modes. The TI-83 PLUS is incomparable to an ordinary scientific calculator -- it is SO much more! I think the TI-83 PLUS is the best buy, since it's upgradable and all. It's better than the the regular TI-83 and a better buy (since it's only a few bucks more). Even the overall look of it is different -- The TI-83 PLUS is pretty slim, in my opinion and its screen is better than the TI-83 screen. Overall, this is one of the best graphing calculators out there!
Rating: - Essential for any High-School Level Math Class
Texas Instruments produces some of the most popular and well known graphing calculators in the industry. The TI-83 plus can do most any math problem found in Algebra I, Geometry, and even some Algebra II/Trigonometry. The wide screen allows for graphing equations and multi-line functions.The graphing capabilities of the TI-83+ are a superb choice for Algebra I classes. The ability to automatically find intersections and a variety of other important components of a graph are only key presses away. The calculator has a powerful matrix editor allowing for easy multiplication, addition, and subtraction of matrices. Division of matrices is not possible. The list editor allows for statistical analysis of data both numerically and graphically. Graphically, the 83+ can plot data in several different formats. Anyone who is familiar with the BASIC computer language can program the TI-83+ with ease. The calculator supports the use of almost every function through a program. Programs can be typed directly into the calculator, or on a computer. The TI-83+ also supports a special form of programs called Flash Applications. Flash Applications are generally quite complex, and are written in a special language on the computer. The manual included with the calculator is superb. It goes into detail on every single option the calculator supports. Every section includes a Quick Start tutorial that provides an practical example covering many of the chapter's topics. Learning to program in TI-BASIC, the programming language of the calculator is possible through reading the entire manual and following the examples. The TI Graph Link cable is the interface between a computer (PC or Mac) and any TI Calculator with a link port. It comes in several variations depending on what kind of computer it will be hooked to. The cable is not included with the calculator, but can be purchased as an option. The TI-83+ Silver Edition includes a Black Link cable for Windows PCs. When the TI-83+ is outgrown, upgrading the TI-89 will require little work for anyone who has gained experience with TI's entry level graphing calculator. The TI-89 has the capability to do Calculus and 3-Dimensional graphs primarily. Overall, the 83+ is an excellent choice for anyone taking an Algebra course or any math class above that. The calculator does basic arithmetic, graphic, statistics, matrices, and a variety of other mathematical operations.
Rating: - The Best Graphing Calc
This has to be one of the best graphing calculators out there. It has the same features as the TI-83+ and more! But also has 3 times for memory and runs 10 times faster. The extra space creates more room for your math/science homework and for programs to help you with your science/math homework. This doesn't have as many features as the TI-89 or TI-92, but those features are often not needed and very confusing. The features that the TI-83 Plus Silver Edition has that the TI-83+ doesn't are: study cards, periodic table, probability simulator, an organizer, 3 times more memory, and it runs 10 times faster. This calculator is allowed on almost all standardized tests unlike the TI-92.
Another great thing about this is it comes with the graph link and software. With them, you can hook up your calculator to the computer and download programs and games onto it, or upload your graphs and problems from your calculator to your computer and print it out. Just think how much easier graphing gets! This is such a great tool, I recommend it to everyone!
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