Online Test Banks
Score higher
See Online Test Banks
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

Use the Point On Tool to Analyze Your TI-Nspire Graph

Some of the more common analyses that are performed on a graphed function on the TI-Nspire include evaluation, finding local maximum and minimum values, and locating zeros. The Point On tool offers a convenient way to accomplish each of these tasks. Here are the steps for using the Point On tool:

  1. Press [MENU]→Points & Lines→Point On to open the Point On tool.

  2. Use the Touchpad to move the cursor and click on the graph.

    A ghosted image of the coordinates at this location appears along with the words point on.

  3. Press [ENTER] or [CLICK] to create the point.

  4. Press [ESC] to exit the Point On tool.

Hovering over the tool icon in the upper-left corner of the screen gives tooltips for how to operate each tool on a Graphs page.


Now move over the point until the grabbing hand symbol appears, and press [CTRL][CLICK] to grab the point. Using the Touchpad, move your point along the graph. Notice that when you approach a local maximum value, the word maximum appears accompanied by the coordinates of this local extreme value.

As you pass through a local minimum, you see the word minimum. As you pass through a zero (x-intercept) the word zero appears.

By default, the coordinate points are given with three significant digits. To change the level of precision, hover your cursor over the x-coordinate so that the grabbing hand symbol appears and the coordinate blinks. Press the [+] key repeatedly to increase the number of displayed digits, and press the [–] key to decrease the number of displayed digits. Repeat this process for the y-coordinate.

As you hover the cursor over the x-coordinate, try clicking [CLICK] twice to allow editing of the x-coordinate. Type a new x-coordinate value and press [ENTER]. Watch the point jump to its new location. You can also edit the y-coordinate.

For functions that are not one to one (meaning in some instances that the y-values are not unique), TI-Nspire jumps to a point with the specified y-value closest to the current location.

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

Inside Sweepstakes

Win $500. Easy.