| Guidelines for Drawing and Analyzing Graphs in
Graphical Analysis 3 In order to refresh
your memory about how to do some of the following in GA3, see
L04.
- Rename the variables in your data table with appropriate physics names.
Enter the correct units and numbers of significant figures or decimal
places.
- Generally, plot the independent variable on the horizontal
axis, although there are sometimes exceptions.
- Title your graph at the top with the names of the variables in
this form: Vertical Axis Variable vs. Horizontal Axis Variable for
Such-and-Such. This is standard scientific form. Note that a
descriptive phrase is added after the variables. Units of measurement aren't required in
the title.
- GA3 connects the data points by default. Always
remove these connecting lines but leave the point protectors.
- GA3 generally doesn't start the axes at 0, but it's
frequently a good idea to be able to see the origin. In order to
change the scaling, double click on the axis on the graph and select the
Axis Options tab. Then make the changes in scaling that you wish.
- If you do a data fit, be sure that the fit results
are displayed on the graph and that they have the appropriate Displayed
Precision. A matching table is also required. The matching table has the
following form. For an example, again see
L04.
| Math |
maps to |
Physics |
Value (rounded) |
Units |
| y |
--> |
|
|
|
| m |
--> |
|
|
|
| x |
--> |
|
|
|
| b |
--> |
|
|
|
|