3-2-8

Using the Graph Window

uTo use box zoom

Example: To use box zoom to enlarge part of the graph y = (x + 5)(x + 4)(x + 3)

(1)On the application menu, tap T.

(2)On the Graph Editor window, input y = (x + 5)(x + 4)(x + 3).

•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 $to graph the functions.

(4)Tap [Zoom] and then [Box], or tap Q.

(5)On the Graph window, drag the stylus to draw a selection boundary around the area you want to enlarge.

(6)Remove the stylus from the display and the area within the selection boundary expands to fill the entire Graph window.

Box Zoom Result

uTo 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 6to 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.

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