# ZoomFit, ZoomStat, ZSquare, and ZInteger Commands on the TI-84 Plus

The ZoomFit and ZoomStat zoom commands on the TI-84 Plus calculator help you find an appropriate viewing window for the graph of your functions. The ZSquare and ZInteger zoom commands readjust the viewing window of an already graphed function.

## ZoomFit zoom command on the TI-84 Plus

This is a really neat Zoom command! If you know how you want to set the *x*-axis, **ZoomFit** automatically figures out the appropriate settings for the *y*-axis.

To use **ZoomFit**, press [WINDOW] and enter the values you want for **Xmin**, **Xmax**, and **Xscl**. See the first screen. Then press [ZOOM][0] to get **ZoomFit** to figure out the *y*-settings and graph your function. See the second screen. **ZoomFit **does not figure out an appropriate setting for **Yscl**, so you may want to go back to the Window editor and adjust this value.

## ZoomStat zoom command on the TI-84 Plus calculator

If you’re graphing functions, this command is useless. But if you’re graphing Stat Plots, this command finds the appropriate viewing window for your plots. See the third screen.

## The TI-84 Plus calculator’s ZSquare zoom command

Because the calculator screen isn’t perfectly square, graphed circles won’t look like real circles unless the viewing window is properly set. **ZSquare** readjusts the existing Window settings for you and then regraphs the function in a viewing window in which circles look like circles. Pictured in the first screen here is a circle in a ZStandard graphing window. See the difference a ZSquare window makes, as shown in the second screen.

To use **ZSquare**, graph the function and then press [ZOOM][5]. The graph automatically appears.

## The TI-84 Plus calculator’s ZInteger zoom command

This command is quite useful when you want the Trace cursor to trace your functions using integer values of the *x*-coordinate, such as when graphing a function that defines a sequence. **ZInteger **readjusts the existing Window settings and regraphs the function in a viewing window in which the Trace cursor displays integer values for the *x*-coordinate. In addition, **ZInteger** sets the **Xscl** and **Yscl** to 10.

To use **ZInteger**, graph the function and then press [ZOOM][8]. Use the

keys to move the cursor to the spot on the screen that will become the center of the new screen. Then press [ENTER]. The graph is redrawn centered at the cursor location. See the third screen.