Use the Point On Tool to Analyze Your TINspire Graph
Some of the more common analyses that are performed on a graphed function on the TINspire 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:

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

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.

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

Press [ESC] to exit the Point On tool.
Hovering over the tool icon in the upperleft 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 (xintercept) 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 xcoordinate 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 ycoordinate.
As you hover the cursor over the xcoordinate, try clicking [CLICK] twice to allow editing of the xcoordinate. Type a new xcoordinate value and press [ENTER]. Watch the point jump to its new location. You can also edit the ycoordinate.
For functions that are not one to one (meaning in some instances that the yvalues are not unique), TINspire jumps to a point with the specified yvalue closest to the current location.