How to Graph Equations on the TI-83 Plus and TI-84 Plus

Posted on February 28, 2011 at 12:54 am

Calcblog’s very first video walks you through all the powerful graphing features available on your TI-83 Plus and TI-84 Plus. Keep reading to learn how to graph functions, find values at specific points along an equation, and use some of …
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Filed under Difficulty: Easy, TI-83 Plus, TI-84 Plus | 2 Comments

How to Change the Batteries on Your TI-83 Plus, TI-84 Plus or TI-89

Posted on February 24, 2011 at 10:49 pm

At some point while using your graphing calculator, you will turn on your calculator and be greeted with one of the following messages: Unlike in many portable electronics, changing your calculator’s batteries does not simply mean swapping them out. In …
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Filed under Difficulty: Easy, TI-83 Plus, TI-84 Plus, TI-89, Voyage 200 | 22 Comments

Factoring Polynomials on the TI-89 and Voyage 200

Posted on February 22, 2011 at 10:29 pm

The TI-89, TI-92 Plus, and Voyage 200 offer two built-in functions for easily factoring expressions and trinomials/polynomials into their component parts. This tutorial explains when to use these functions and how to use them to solve simple equations and polynomials.

Filed under Algebra, Difficulty: Easy, TI-89, TI-92 Plus, Voyage 200 | Leave a comment

SAT Test Prep #2: Power Rules of Exponents

Posted on February 15, 2011 at 10:54 pm

While you will be able to use a graphing calculator on the SAT, sometimes it is faster to have mathematical rules memorized beforehand so you can quickly solve problems without trying to find the answer by trial and error with …
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Filed under Algebra, Difficulty: Easy, SAT, Test Prep | Leave a comment

How to Create a Simple Quadratic Formula Program on the TI-89 and Voyage 200

Posted on February 13, 2011 at 9:30 pm

Like the TI-83 Plus and TI-84 Plus, the TI-89, TI-92 Plus, and Voyage 200 graphing calculators all have their own integrated programming language, TI-BASIC. While this language is somewhat more complex on the TI-89/V200 series than the the TI-83 Plus …
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Filed under Algebra, Calculator Program, Difficulty: Medium, TI-89, TI-92 Plus, Voyage 200 | 22 Comments

Quick Tip: How to Clear Variables on the TI-89, TI-92 Plus, and Voyage 200

Posted on February 9, 2011 at 11:12 pm

Sometimes, it is useful to store specific values in the letter variables (a-z) on your device, especially if you will be using that specific value over and over again. For example, you can store the value of Planck’s constant on …
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Filed under Difficulty: Easy, TI-89, TI-92 Plus, Voyage 200 | 1 Comment

Hypothesis Testing using the Z-Test on the TI-83 Plus, TI-84 Plus, TI-89, and Voyage 200

Posted on February 6, 2011 at 11:39 pm

The TI-83 Plus and TI-84 Plus are optimized for performing many tasks in statistics, and one of their most powerful features is the ability to perform a variety of tests of statistical significance. With the statistics package installed, the TI-89, …
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Filed under Difficulty: Medium, Statistics, TI-83 Plus, TI-84 Plus, TI-89, TI-92 Plus, Voyage 200 | 1 Comment

Business and Finance Math #3: Converting Effective Interest Rates (EAR) to Stated Interest Rates

Posted on February 2, 2011 at 12:18 am

In our previous blog post we introduced the concept of the effective annual rate (EAR), which is the true interest rate when compounding occurs more than one time per year. For example, 10% compounded semiannually is the same thing as …
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Filed under Difficulty: Easy, Finance, HP 12c, TI BA II Plus | Leave a comment