Chapter 16: Interactive Differential Calculus Application  272
4. Use the cursor keys to move the vertical line, and observe how the
y1 and y2 values change.
• Compare
y1 and y2. You should also observe the green tangent (y1 tangent) at this time.
• The current location of the vertical line (x value) corresponds to the highlighted cell in the x-column of the
number table.
• You can also move the vertical line by dragging it with the stylus.
u To change the group of items displayed in the number table
Tap ; to cycle through the settings shown below.
x, y1, y2 display x, y2, y3 display x, y1, y2, y3 display
Changing the items of the number table will also change the graph drawn on the DiffCalc Graph window.
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