How to Use a Graphing Calculator for Algebra

When calculating algebraic functions, sometimes it's nice to use a graphing calculator to get a picture of what the function looks like graphically. For instance, when analyzing functions dealing with rates of change, a graphing calculator is a quick and easy way to get a better visualization. Here's how to use a graphing calculator to better understand your algebraic functions.

Instructions

Difficulty: Moderate

1. Find a brand of graphing calculator that you feel comfortable with and that you find easy to use. For instance, if you are used to a Casio scientific calculator, try the Casio graphing calculator for algebraic problem solving. Ask your teacher for a recommendation on a band that is easiest to use that will also have the most functionality.
2. Take the time to go through the manual. Start with the "quick start" section to become familiar with how to enter exponents and other algebraic functions. If you don't do this, you'll get a different graphical output than the one expected.
3. Learn how to properly group numbers for the graphing calculator. Some use brackets, while others use parentheses. In algebra, you need to group numbers correctly to achieve the desired result.
4. Practice with a few functions in which you know the graphical output. For instance, put in a simple function of "f(x)=2x+1" and make sure the output is the familiar algebraic graph. This will help you gain confidence in your ability to use the graphing functionality and increase your trust that you've entered the function correctly.
5. Try online graphing calculators. These have the benefit of being free, although you won't be able to take them to class with you unless you're able to bring a laptop computer to class with you.

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