The window settings clearly do not effectively reveal the graph on the TI-Nspire. The *x*-values of the function represent the width of the rectangle, and the *y*-values represent the area. The *y*-values are positive. Therefore, it makes sense to focus on the first quadrant only.

To grab the entire coordinate plane, move the cursor to some open space and press **[CTRL][CLICK]**. You see the crunched up paper symbol with a hand, indicating that the entire coordinate plane can be translated in any direction. Use the Touchpad keys to move the graph so that the origin is located in the lower-left corner of the screen. Press **[ESC]** to release the coordinate plane.

Unfortunately, the maximum point on the parabola is still not in view. TI-Nspire allows you to grab the tick marks on the axes themselves to change these end values. Here’s how:

Move the cursor over the

*x*-axis. Both axes start to pulse, and the word*axes*appears on the screen.If another object (like text) gets in the way of finding the

*x*-axis, press**[TAB]**to cycle through and find any layered objects.Press [CTRL][CLICK] to grab both axes.

Press the Touchpad keys to drag the tick marks. Moving away from the origin zooms out. Moving toward the origin zooms in.

Press [ESC] when the vertex of the parabola comes into view.

Perhaps you want to adjust the scale of the *x*-axis only to completely fill the space in the work area with your graph. Follow these steps to do so:

Move the cursor over the

*x*-axis. Again, both axes start to pulse, and the word*axes*appears on the screen.Press [CTRL][CLICK] to grab

*both axes.*Press and hold [SHIFT] as you press the Touchpad keys to drag the tick marks, moving toward the origin to decrease the scale of only the

*x*-axis and moving away from the origin to increase the scale of only the*x*-axis.Press [ESC] to release the

*x*-axis.

The last two screens show the result of dragging both axes and a single axis, respectively.

Here are two more options that can be used to adjust the window settings:

**Move the cursor to an axis end value (assuming that it’s in view) and press [CLICK] twice to highlight the current end value.**Type a new end value and press**[ENTER]**to put the change into effect. To edit all four end values one after the other, don’t press**[ENTER]**after changing an end value. Instead, press**[TAB]**to rotate in a clockwise manner to the next end value.**Press [MENU]→Window/Zoom→Window Settings.**This action opens a dialog box and enables you to type your minimum and maximum end values as well as the scale. Press**[ENTER]**to put the changes into effect.