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36 Using the Scratchpad
Finding Points of Interest
You can use the tools on the Analyze Graph menu to find a point of interest in a
specified range of any graphed function. Choose a tool to find zero, the
minimum or maximum, the point of intersection or inflection, or the numeric
derivative (dy/dx) or Integral on the graph.
1. Select the point of interest that you want to find on the Analyze Graph
menu. For example, to find a zero, press b 6 1.
non-CAS CAS
Zero
b 6 1 b 6 1
Minimum
b 6 2 b 6 2
Maximum
b 6 3 b 6 3
Intersection
b 6 4 b 6 4
Inflection Not applicable
b 6 5
dy/dx
b 6 5 b 6 6
Integral
b 6 6 b 6 7
Analyze Conics
b 6 7 b 6 8
The icon for the selected tool is displayed at the top left on the work area.
Point to the icon to view a tooltip about how to use the selected tool.
2. Click the graph you want to search for the point of interest, and then click a
second time to indicate where to start the search for the point.
The second click marks the lower bound of the search region and a dotted
line is displayed.
Note: If you are finding the derivative (dy/dx), click the graph at the point
(numeric value) to use for finding the derivative.
3. Press ¡ or ¢ to move the dotted line that marks the search region, and then
click the point at which you want to stop the search (upper bound of the
search region).