•Pressing w while the pointer is on a graph (during Trace, G-Solve, etc.) will place a dot at the pointer location along with a label which shows the coordinates at the dot location. Pressing aD removes the last dot and coordinate label that was created.

•Dots created with the above operation will appear as  for coordinate values that are included in the graph expression, and  for values that are not. For example, a dot at coordinates (2,1) on the graph Y=2X will be , while a dot at coordinates (2,1) on the graph Y>2X will be .

kDisplaying the Derivative

In addition to using Trace to display coordinates, you can also display the derivative at the current pointer location.

1.From the Main Menu, enter the Graph mode.

2.On the Setup screen, specify “On” for “Derivative”.

3.Draw the graph.

4.Press !1(TRACE), and the pointer appears at the center of the graph. The current coordinates and the derivative also appear on the display at this time.

kGraph to Table

You can use trace to read the coordinates of a graph and store them in a number table. You can also use Dual Graph to simultaneously store the graph and number table, making this an important graph analysis tool.

1.From the Main Menu, enter the Graph mode.

2.On the Setup screen, specify “GtoT” for “Dual Screen”.

3.Configure V-Window settings.

4.Save the function and draw the graph on the main (left) screen.

5.Activate Trace. When there are multiple graphs on the display, press f and c to select the graph you want.

6.Use d and e to move the pointer and press w to store coordinates into the number table. Repeat this step to store as many values as you want.

• Each press of w places a dot on the graph at the current pointer location.

7.Press K1(CHANGE) to make the number table active.

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