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199
kk
kk
k Other Graph Functions with Dual Graph
After drawing a graph using Dual Graph, you can use the trace, zoom, sketch and
scroll functions. Note, however, that these functions are available only for the active
(left) graph. For details on using these functions, see “8-6 Other Graphing Func-
tions”.
• To perform any of the above operations on the inactive graph, first move the
inactive graph to the active screen.
• The graph screen will not scroll while a trace operation is being performed on the
active graph.
The following shows some example operations using the zoom function.
Example 1 To use box zoom to enlarge the graph of y = x (x + 1) (x – 1)
Use the following View Window parameters for the active graph.
Assume that the function is already stored in memory area Y1.
Draw the graph.
6(DRAW) or w
Specify one corner of the area to be enlarged.
!2(Zoom)1(BOX)
c ~ ce ~ ew
• Use the cursor keys to move the pointer to the
location you want.
Displaying a Graph in the Inactive Screen 11 - 4
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