3-8-7

Analyzing a Function Used to Draw a Graph

u To determine the distance between any two points

(1)Tap the Graph window to make it active.

(2)Tap [Analysis], [G-Solve], and then [Distance].

•This displays “Distance” on the Graph window, and the ClassPad waits for you to specify the first point.

(3)Tap the first point on the Graph window.

•This causes a pointer to appear at the location where you tap.

(4)Tap the second point on the Graph window.

•This causes a pointer to appear at the second point, and the distance between the two points to appear in the message box.

Result Screenshot

Tip

•Instead of tapping points on the Graph window, you could also specify points by inputting their coordinates. Without tapping the Graph window, input a value. This causes a coordinate specification dialog box to appear. Input the x- and y-coordinates of the two points.

u To determine the inflection point

You can use the following procedure to determine coordinates of the inflection point for a cubic function.

Example: To graph the function y = x3 – 1 and determine its inflection point

u ClassPad Operation

(1)Display the View Window dialog box, and then configure it with the following parameters.

xmin = –4.9,

xmax = 4.9,

xscale = 1

ymin = –3.3,

ymax = 1.8,

yscale = 1

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