Dotplots
The dotplot on both of the TI-82 and TI-83 graphing calculators is a scatterplot in
which the data points from the Xlist and Ylist selected are plotted as coordinate pairs.
The points reflecting the coordinate pairs can be shown as a box, a cross, or as a point
depending on which mark is chosen by the user. The Xlist and Ylist selected must
have the same number of entries to create the coordinate pairs. The same list can be
chosen for both coordinates.
Steps for creating a dotplot:
1. Using the following data set, enter the 'Year' as List 1 (L1)
and the 'Weight' as List 2 (L2). The order of entry is essential to preserve the
pairing of the data.
Year |
1 |
2 |
3 |
4 |
5 |
6 |
8 |
10 |
12 |
15 |
20 |
Wght |
14 |
25 |
33 |
36 |
42 |
53 |
64 |
78 |
85 |
96 |
125 |
2. Press 
, 
, and 
to setup Plot 1. Press to turn Plot 1 on.
Press 
and to select the scatterplot with
points only.
3. Select the correct Xlist and Ylist according to the entry of the data. Notice the Xlist, which are the x coordinate values on the horizontal axis, should be set for List 1, and the Ylist, which are the y coordinate values on the vertical axis, should be set for List 2.
4. Select the correct Mark to plot the coordinate points. The chosen mark is the box, however it can be changed to a cross or a point.
5. Set the viewing window for the dotplot by pressing 
. To see the dotplot entirely, the Xmin
must be less than the smallest X value and the Xmax must be set greater than the largest X
value, while the Ymin value should be set at -1 and the Ymax should be set greater than
the largest weight. 
6. Press 
to see the scatterplot. The scatterplot should look like the plot
below.