3-2-8

Using the Graph Window

u To use factor zoom

Example: To enlarge the graphs of the following two expressions, by a factor of 5 in both directions, to determine whether they come into contact with each other

y1 = (x + 4)(x + 1)(x – 3)

y2 = 3x + 22

(1)On the application menu, tap T.

(2)On the Graph Editor window, input y1 = (x + 4)(x + 1)(x – 3) and y2 = 3x + 22.

•For details about how to input an expression, see “Function Storage and Graphing Example” on page 3-1-7 and “3-3 Storing Functions”.

(3)Tap 6 to display the View Window, and then configure it with the following parameters.

xmin = –8, xmax = 8, xscale = 1

ymin = –30, ymax = 30, yscale = 5

•See “To configure View Window parameters” on page 3-2-1.

(4)Tap $ to graph the functions.

(5)Tap [Zoom] and then [Factor].

•This displays a dialog box for configuring x- and y-axis zoom factor settings.

(6)Input 5 for both the xFactor and yFactor, and then tap [OK].

(7)Tap T, and then use the stylus to drag the screen image so the part you want to zoom is in the center of the screen.

(8)Tap [Zoom] and then [Zoom In].

Factor Zoom Result

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