Advertisement
Online Test Banks
Score higher
See Online Test Banks
eLearning
Learning anything is easy
Browse Online Courses
Mobile Apps
Learning on the go
Explore Mobile Apps
Dummies Store
Shop for books and more
Start Shopping

How to Analyze Captured Data on TI-Nspire

After you have both graphical and numerical results available on the TI-Nspire, you can analyze them to discover find and graph an equation to model a scatter plot or to sort the data to find the length that produces a maximum area, among other things.

  • Find and graph an equation to model the scatter plot. An inspection of the scatter plot suggests that a quadratic equation can be used to model the data. In fact, if you let x represent the length of the parabola, you can find an expression for the area in terms of x, knowing that the perimeter has a fixed value.

    In the example, there is a fixed perimeter of 20 centimeters. Therefore, the width of the rectangle must be 10 – x. The formula for the area is the product of length and width, or area(x) = x(10 – x). Type this equation into f1(x) on the entry line to verify that it goes through the scatter plot. Don’t forget to include a multiplication sign between the length and the width! See the first screen.

  • Sort the data to find the length that produces a maximum area. For those of you who are more into the numbers, move to the Lists & Spreadsheet application, highlight columns A and B, and perform a descending sort by column B. The second screen shows how to configure the Sort dialog box. The third screen shows that, for my example, the area is maximized for a length of approximately 4.833 centimeters.

    image0.jpg

Formulas contained in the formula row are deleted anytime you do a sort on that column. Press [CTRL][ESC] to undo the sort and restore the formulas.

  • Add a Comment
  • Print
  • Share
blog comments powered by Disqus
Advertisement
Advertisement

Inside Dummies.com

Dummies.com Sweepstakes

Win an iPad Mini. Enter to win now!