Getting
Started:
Creating A Fit of the Data Alternatnatively, you can
fit the data automatically. If you installed without the curve fitting, you can
move on to the next section. To fit the velocity versus time data,
click once on the velocity plot (the time labels should move back down the bottom
of the window). Then choose Graph->Add/Edit Fit or click
on the  icon. The Following dialog
should appear. 
Curve fitting dialog Leave the "Type of Fit;" to "Linear".
If you want VideoPoint to update the fit every time that you move a point on the
movie, check the "Update Automatically" box, otherwise, you can update the fit
by opening this dialog and choosing "OK" or "Apply" later. For
this example, check the box and click on "OK". The fit of the
velocity plot should appear and look something like this: 
Fit of y component of velocity vs. time.
As you might expect, the slope of this line should be approximately -9.8, since
this can be modeled by the equation V = V0 + at.
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