Press .

Press the number associated with an option or use the cursor keys to select an option and press .

Press to select plot 1 which shows current settings for stored information.

Press to select plot 2 which shows current settings for stored information.

Press to select plot 3 which shows current settings for stored information.

Press to select plots off which turns the plots off.

Press to select plot on which turns the plots on.

The setup for Plot 1, Plot 2, or Plot 3 can be altered. For example, press .

**Type** determines whether the graph is a scatter plot, line connecting
the data points, box plot, histogram, or a normal probability plot.

**XList** determines the list from which the x values are defined.
**YList** determines the list from which the y values are defined.

**Mark** determines the appearance of each point, a box, cross, or
dot.

For example, the following set up generates a scatter plot with cross marks using the data from lists L1 and L2.

Change the type of graph to the second option produces a line graph. The following line connects the points marked by small boxes in the order of appearance on lists L1 and L2.

Selecting box plot uses data from only the XList. The "whiskers" on the plot will extend from the minimum data point in the set (minX) to the first quartile (Q1) and from the third quartile (Q3) to the maximum point (maxX). The quartile Q1 is the median of the data to the left of the median (Med). The quartile Q3 is the median of the data to the right of Med. The box is defined by Q1, Med, and Q3. For example,

generates the box plot

The frequency (Freq) of the data above is 1. If any given data occurs in the set more than once, this information can be stored in a second list and the Freq set accordingly. For example,

generates

Selecting histogram uses data from only the XList. A vertical bar is displayed to represent the data elements. The placement of the bars is determined by the Xmin and Xscl setting in . Beginning at the Xmin value, a new bar is possible every Xscl units. The wider the bar, the broader the range of data elements that each bar represents. If a data value occurs on the edge of a bar, it is counted in the bar to the right. For example,

generates

The frequency (Freq) of the data above is set to 1. If any given data occurs in the set more than once, this information can be stored in a second list and the Freq set accordingly. For example,

Gives

The following shows the effect of changing Xscl setting.