Graph The Derivative Of A Function On The TI-84 Plus

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HomeTechnology ArticlesElectronics ArticlesGraphing Calculators ArticlesGraph the Derivative of a Function on the TI-84 PlusByJeff McCalla C. C. Edwards Updated2016-03-26 14:03:11From the bookTI-84 Plus CE Graphing Calculator For DummiesShare

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In calculus, you need to graph the derivative of a function in order to find its critical points, which you can do on your TI-84 Plus calculator. Just follow these steps:

1. Enter your functions in the Y= editor.

2. Use the arrow keys to place your cursor in an open equation in the Y= editor.

3. Press [MATH][8] to access the nDeriv template.

4. Press

   

   then press [ALPHA][TRACE] and choose your function, then press the right arrow and

   

   See the first screen. This is a sneaky move. You aren't using the nDeriv( template to take the derivative at a specific x-value. Instead, by taking the derivative at x = x, you are taking the derivative at all points where the function is defined.

   

5. Press [GRAPH] to display the graph of your function and the derivative of the function.

   See the second screen.

6. Press [2nd][TRACE] to access the Calculate menu.

7. Press [2] to select the zero option.

8. If necessary, repeatedly press the up- and down-arrow keys until the derivative function appears in the border at the top of the screen.

   Don’t forget to do this step!

9. Enter the Lower and Upper Bounds, then a guess and press e.

   This is illustrated in the third screen.

About This Article

This article is from the book: 

TI-84 Plus CE Graphing Calculator For Dummies

About the book author:

Jeff McCalla teaches Algebra 2 and Pre-Calculus at St. Mary's Episcopal School in Memphis. He is a T3 instructor for Texas Instruments and co- founder of the TI-Nspire SuperUser group.

C.C. Edwards is an instructor at Coastal Carolina University and a former editor of Texas Instruments' Eightysomething, a newsletter for parents and educators.

This article can be found in the category: 

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