## Business and Finance Math #1: Future Value of an Annuity Due

Business and Finance Math is an ongoing series produced by Calcblog to present topics and concepts found in the world of business and finance. Our goal with this series is to provide you with a practical framework for identifying and understanding situations where these business and financial concepts are used. For our first post in this series we present a classic time value of money (TVM) problem involving annuities.

Consider the following situation:

Chuck Moyer, who is currently attending college, has a rich uncle who has decided to put aside some money each year for Chuck so when he graduates he’ll be able to pay off his college loans. Chuck’s uncle places \$5,000 into an investment account earning 6% at the beginning of each year. When Chuck graduates from college in four years, how much money will he receive from his uncle?

Filed under Difficulty: Medium, Finance, HP 12c, TI BA II Plus | 3 Comments

## Performing a Linear Regression on the TI-89, TI-92+, and Voyage 200

Unlike with the TI-83+ and TI-84+, it is relatively hard to perform statistics operations on the TI-89, TI-92+, and Voyage 200 the first time around. This tutorial demonstrates using the statistics functions available on this series of calculators to perform a linear regression on the same set of data as in the TI-83+ and TI-84+ Tutorial.

 X 1 3 5 7 9 Y 10 31 55 73 94
Filed under Difficulty: Hard, Statistics, TI-89, TI-92 Plus, Voyage 200 | Leave a comment

## Happy New Year!

Calcblog wishes you a happy and successful New Year! We have some big ideas for the website in 2011 and we look forward to sharing them with you. Thank you for supporting us!

## Riemann Sum Program for the TI-83+ and TI-84+

RIEMANN, a program for the TI-83+ and TI-84+, approximates the area under a curve (integral) by calculating a Riemann sum, a sum of areas of simple geometric figures intersecting the curve. The program solves Riemann sums using one of four methods and displays a graph when prompted. The program itself is optimized to smaller than 1 kilobyte to reduce its memory impact. This tutorial covers the theory of Riemann sums and how to use this program.

Filed under Calculus, Difficulty: Easy, TI-83 Plus, TI-84 Plus | 6 Comments

## Three Applications to Turn Your TI-83+ or TI-84+ into a TI-89

The TI-89 series of calculators is packed with features that, unfortunately, are lacking in the TI-83+ and TI-84+. This tutorial will show you how to install and use three applications to add 3D graphing, symbolic differentiation, simplifying equations, and pretty-print to your TI-83+ or TI-84+.

Filed under Algebra, Calculus, Difficulty: Medium, TI-83 Plus, TI-84 Plus | 18 Comments

## Performing a Linear Regression on the TI-83+ or TI-84+

Linear relationships are examined in practically every discipline of the natural and social sciences. Using the statistics functions of the TI-83+/TI-84+ it is relatively easy to investigate this relationship by performing a linear regression on two variables, such as the following list:

 X 1 3 5 7 9 Y 10 31 55 73 94

You can also find this tutorial for the TI-89/TI-92 Plus/Voyage 200 here.

Filed under Difficulty: Medium, Statistics, TI-83 Plus, TI-84 Plus | 29 Comments

## Creating a Simple Quadratic Formula Program on Your TI-83 Plus or TI-84 Plus

One of the most useful features of the TI-83 Plus/TI-84 Plus series of calculators is their integrated programming language, TI-BASIC. Unfortunately, not much documentation exists online on how to create programs using this feature. This tutorial provides an introduction on how to create a simple program to solve one of the most ubiquitous problems in elementary mathematics, finding the zeros of a quadratic equation.

## Evaluating Integrals on your TI-89, TI-92+, or Voyage 200

This tutorial demonstrates how to evaluate integrals using the TI-89, TI-92+, or Voyage 200 graphing calculators. Symbolic integration is one of the most powerful features of the TI-89 and makes it an extremely useful calculator for calculus.

Filed under Calculus, Difficulty: Easy, TI-89, TI-92 Plus, Voyage 200 | 1 Comment

## Transferring Spreadsheets Between Microsoft Excel and your TI-83+, TI-84+, TI-89, TI-92+, or Voyage 200

Using these steps are useful when you want to put large amounts of data on your TI-83 Plus, TI-84 Plus, TI-89, TI-92+, or Voyage 200 calculator for statistical analysis. Afterwards you can also transfer data back from your calculator to Excel. If you aren’t sure how to connect your calculator to a computer, you can read our article on installing TI-Connect here.

## Welcome to Calcblog!

Welcome to Calcblog! Calcblog’s goal is to enable you to get the most out of your graphing or financial calculator. After scouring the web for tips, walkthroughs, and programs for our own calculators, we decided to launch Calcblog to offer all these resources to you in one place.

## A Quick Tour of our Website

Calcblog is broken into three sections to help you locate information you are looking for:

### Blog

The Blog is the heart of Calcblog. In this section we provide in-depth walkthroughs of how to use your calculator for various applications. We also post calculator programs, reviews, quick tips, and solutions to math problems that you might find in class or on standardized tests. To make browsing our blog easy for you, posts are classified by difficulty, subject, and relevant calculators.

### Articles

The Articles section provides walkthroughs to help you get started with using your graphing or financial calculator. Currently we have articles on the TI-83+ / TI-84+ and TI-89 calculator families. In the future we will offer content for financial calculators such as the HP 12c and the Texas Instruments BA II Plus.