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Using the Sketch Menu

u To draw a vertical or horizontal line

Example: To draw a vertical line at x = 2

(1)While the Graph window is active, tap [Analysis], [Sketch], and then [Vertical].

•This displays “Vertical” on the Graph window, and the ClassPad waits for you to draw the vertical line.

(2)Press 2.

•This displays a dialog box for specifying the x-coordinate of the vertical line, with 2 specified as the x-coordinate.

•Instead of inputting a value here, you can use the stylus to tap the point through which the vertical line should pass.

(3)Tap [OK].

•This closes the dialog box and draws the vertical line at x = 2.

Tip

•To draw a horizontal line, tap [Analysis], [Sketch], and then [Horizontal] in place of [Vertical] in step (1) of the above procedure. In the case of a horizontal line, you need to specify the y-coordinate in step (2).

u To clear figures inserted using the Sketch menu

To clear plots, lines, text, or other figures inserted using the [Sketch] menu, tap [Analysis], [Sketch], and then [Cls].

• This redraws the graph to what is stored on the Graph Editor window.

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