HP 39g+ Graphing manual Example plotting a circle, Function aplet, specify the functions

Example: plotting a circle

Plot the circle, x 2+ y 2 = 9. First rearrange it to read

y= ± 9 – x2 .

To plot both the positive and negative y values, you need to define two equations as follows:

y= 9 – x2 and y = – 9 – x2

1.In the Function aplet, specify the functions.

Select

Function

9

9

2. Reset the graph setup to the default settings.

SETUP-PLOT

CLEAR

3.Plot the two functions and hide the menu so that you can see all the circle.

4.Reset the numeric setup to the default settings.

SETUP-NUM

CLEAR

Aplets and their views 2-21