## Plotting Parametric Equations on the TI-83+ and TI-84+

We at Calcblog hope you had a great winter vacation! So far, we’ve posted tutorials on graphing in rectangular/Cartesian and polar coordinates, but there are other ways to specify functions. One of these is as a function of a parameter, …

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## Video: Using Variables on Your TI Graphing Calculator

We just posted our second video tutorial to YouTube! This tutorial covers the basic use of variables to help with calculations, a technique that will help you use your calculator more effectively and avoid making mistakes when entering quantities. We …

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## How to Graph Polar Equations on the TI-83+ and TI-84+

Polar coordinates are another way of representing a two-dimensional space, just like Cartesian (rectangular) coordinates. Instead of x and y, points are described using r, a radius, and θ (theta), the angle counterclockwise from the positive x axis. In this …

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## Algebra Series Index

We originally ran our series on Algebra skills from October 24-28, 2011, and received positive feedback from teachers and students on the content. To make this data easier to access, we’ve placed links to all the articles here—in one place …

## How to Round Numbers on the TI-84 Plus and TI-89

Sometimes it’s useful to work in units with only a certain number of decimals. For example, if you’re doing money calculations, you probably don’t want to think about fractions of cents. If you want to change the number of decimals …

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## Algebra Mini-Series #5: Fraction Mistakes, Cross Multiplying, and Solving Rational Equations

This is the final installment of our weeklong series on improving your algebra skills. Our goal for this series was to provide a useful resource for both students and teachers, so that this article can be used in the classroom, …

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## Algebra Mini-Series #4: Use Multiplication in Equations Wisely

This is part four of our weeklong series on improving your algebra skills. Our goal for this series is to provide a useful resource for both students and teachers, so that this article can be used in the classroom, for …

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## Algebra Mini-Series #3: Using Substitution To Solve Equations

This is part three of our weeklong series on improving your algebra skills. Our goal for this series is to provide a useful resource for both students and teachers, so that this article can be used in the classroom, for …

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## Algebra Mini-Series #2: Moving Quantities Left and Right in Equations

This is part two of our weeklong series on improving your algebra skills. Our goal for this series is to provide a useful resource for both students and teachers, so that this article can be used in the classroom, for …