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2. (Optional) To change the trace step increment for tracing, press
b 5 3.
After you type a different step increment, the Graph Trace tool moves
across the graph in steps of that size.
3. Use Graph Trace to explore a plot in the following ways:
• Move to a point and hover to move the trace cursor to that point.
• Press ¡or¢ to move from point to point on the function’s graph. The
coordinates of each point traced are displayed.
• Press £or¤ to move from one plot to another. The point’s
coordinates update to reflect the new location of the trace. The trace
cursor is positioned on the point of the new graph or plot with the
closest x value to the last point identified on the previously traced
function or graph.
• Type a number and press · to move the trace cursor to the point on
the plot with independent coordinates nearest the typed value.
• Create a persistent point that remains on the graph by pressing ·
when the trace point reaches the point you want to label. The point
remains after you exit Graph Trace mode.
Notes:
• The string undef is displayed instead of a value when you move over
a point that is not defined for the function (a discontinuity).
• When you trace beyond the initially visible graph, the screen pans to
show the area being traced.
4. Press d or choose another tool to exit Graph Trace.
Using the Scratchpad 35