Press then

Select 1: Plot 1 or press

This will show the menu for Plot 1

To activate Plot 1 press (the cursor will already be flashing over On).

• Type: selects the appropriate form of graph. Use the cursor to select scatter graph or line graph and press

• Xlist: selects the x-axis
  Either press and L1 or any other of the lists (L₂, L₃, L₄ etc.) if it is a set of data which has been recently entered.
  
  Or press and to reveal the LIST menu. Scroll down the lists to the one you have stored previously as the x-axis and press .
  Note you must unarchive the list before selecting it. You cannot plot graphs with archived lists.

• Ylist: selects the y-axis.
  Repeat the same procedure as for the x-axis.

• Mark: selects shape of the data points: squares, plus sign or dots. Using the cursor choose the point, then press .

When these are all entered press then select : ZoomStat and a scaled graph will be plotted on the screen.

STAT PLOT will allow you to plot up to three graphs at once. This done by activating Plot1, Plot2 and Plot3.

In each case use the same list for the Xlist and different ones for the Ylist.

Press then or select 9 : ZoomStat and the two or three lines will be plotted on the same scaled graph.

Because the graph is scaled to fit the calculator screen it may exaggerate or flatten one of the lines. You may need to go into the lists and increase or decrease the values by a factor. This can be done by using the key

Select a list of data. L₁, L₂ etc if it has been recently entered or using the cursor to move to the head of the last list on the spread sheet, the one after L₁₀ which is unnamed. Press then and select the list you want to see on the spread sheet.

Press and its name will appear at the bottom of the screen. Press and the values will appear in the column. Repeat this for other lists.

Create a new list (e.g. L100) , press and type in the appropriate equation on the bottom of the screen as follows: select the list you want to modify ( then , scroll down and then ) and then multiply it by the appropriate factor.

Press and the spread sheet will calculate the conversion for all the values in the list.

Now plot Time against Light x 100 and Volts.

Open and select Plot1
Switch it to On by pressing .

Under Type: select the histogram type of presentation. Scroll to Xlist: and select the list you want to plot. Press then then scroll down to the list of data. Press . There is no Ylist because the histogram plots the frequency of the different data in the Xlist in regular groups called class intervals. These are set automatically by the calculator. Press then and the histogram will appear.

If you want to see if the histogram approaches a normal distribution you may test this using the normal probability graph. This is the last type of graph in the STAT PLOT series.

Return to STAT PLOT and Plot 1. Scroll to Type: Then scroll through the list to the last one and press . Press then . The graph that appears now will be a scattergram of points. If they fall into a diagonal line, the distribution of the data follows a normal distribution.

Sometimes it is useful to limit the number of significant places after the decimal point. This can be adjusted using the MODE menu.

Press MODE, scroll down to Float and scroll along to the desired number of places.

Press

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