Data Collection and Analysis 729
The examine line moves from data point to data point. When Interpolate
is on, the examine line moves between and beyond data points.
To turn Interpolate on and off:
³ Select
Analyze > Interpolate.
When Interpolate is on, a check mark appears in the menu next to the
option.
To use Interpolate:
1. When Interpolate is on, move the cursor over the graph and click
once. The examine indicator is drawn to the nearest data point.
The values of the plotted data are shown in the View details area and
the All Details for Graph dialog box.
2. You can move the examine line by moving the cursor with your arrow
keys or clicking on another data point.
Tangent
Tangent is used to display a measure of the rate at which the data is
changing at the point you are examining. The rate value is displayed in
the View Details area and in the All Details for Graph dialog box. The
value is labeled “Slope.”
To turn Tangent on and off:
1. Select
Analyze > Tangent.
When Tangent is on, a check mark appears in the menu next to the
option.
2. When Tangent is on, move the cursor over the graph and click once.
The examine indicator is drawn to the nearest data point.
The values of the plotted data are shown in the View details area and
the All Details for Graph dialog box.
3. You can move the examine line by moving the cursor with your arrow
keys or clicking on another data point.
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