Texas Instruments TI-92 Getting Started page 24

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Graphing Technology Guide: TI-92

and press F1 [Manage] 1 [Delete] ENTER. The TI-92 will ask you to confirm the deletion by pressing ENTER

once more.

Now press APPS 6[Data/Matrix Editor] 3[New]

P R I Z E ENTER to open a new variable called PRIZE

(Figure 5.66). Press ENTER to then begin entering the variable values, with the years going in column c1. Instead

of entering the full year 198x, enter only x. Here are the keystrokes for the first three years: 1 ENTER 2 ENTER 3

ENTER and so on, then press

to move to the next list. Use the cursor pad to move up to the first row and press

1.61 ENTER 2.07 ENTER 2.41 and so on (see Figure 5.67).

Figure 5.66: Entering a new variable

You may edit statistical data in almost the same way you edit expressions in the Home screen.

will delete the

entire cell, not just the character or value to the left of the cursor. Thus, move the cursor to any value you wish to

change, then type the correction. To insert or delete a data point, move the cursor over the data point (cell) you wish

to add or delete. To insert a cell, move to the cell below the place where you want to insert the new cell and press

F6[Util] 1 [Insert] 1 [cell] and a new empty cell is open.

Figure 5.67: Entering data points

5.5.2 Plotting Data: First check the MODE screen (Figure 5.1) to make sure that you are in FUNCTION graphing

mode. With the data points showing, press F2[PIot Setup] to display the Plot Setup screen. If no other plots have

been entered, Plot 1 is highlighted by default. Press F1 [Define] to select the options for the plot. Use

, and

ENTER to select the Plot Type as Scatter and the Mark as a Box. Use the keyboard to set the independent

variable, x, to c1 and the dependent variable, y, to c2 as shown in Figure 5.68, then press ENTER to save the

options and press

GRAPH to graph the data points. (Make sure that you have cleared or turned off any functions

in the Y= screen, or those functions will be graphed simultaneously.) Figure 5.69 shows this plot in a window from

0 to 10 horizontally and vertically. You may now press F3[Trace] to move from data point to data point.

To draw the scatter plot in a window adjusted automatically to include all the data you entered, press F2[Zoom] 9

[ZoomData].