User Manual

5-30
4 3(TYPE) 1(Y=) v(v+c)(v
-c)w
5 6(DRAW)
6 !4(SKTCH) 2(Tang)
7 e~ ew*
1
*
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You can draw a tangent line in succession by moving the “ ” pointer and pressing w.
12. Function Analysis
k Reading Coordinates on a Graph Line
Trace lets you move a pointer along a graph and read out coordinates on the display.
1. From the Main Menu, enter the GRAPH mode.
2. Draw the graph.
3. Press !1(TRCE), and a pointer appears in the center of the graph.*
1
4. Use d and e to move the pointer along the graph to
the point at which you want to display the derivative.
When there are multiple graphs on the display, press
f and c to move between them along the
x -axis of
the current pointer location.
5. You can also move the pointer by pressing v to display the pop-up window, and then
inputting coordinates.
The pop-up window appears even when you input coordinates directly.
To exit a trace operation, press !1(TRCE).
*
1
The pointer is not visible on the graph when it is located at a point outside the graph display
area or when an error of no value occurs.
• You can turn off display of the coordinates at the pointer location by specifying “Off” for the
“Coord” item on the Setup screen.
• The following shows how coordinates are displayed for each function type.
Polar Coordinate Graph
Parametric Graph
Inequality Graph
k Displaying the Derivative
In addition to using Trace to display coordinates, you can also display the derivative at the
current pointer location.