HP 39gs Graphing manual Plotting a piecewise-defined function, Open the Function aplet

Plotting a piecewise-defined function

Suppose you wanted to plot the following piecewise- defined function.

⎧	x + 2		;x ≤ –1
⎪
f(x) = ⎨	x	2	;–1 < x ≤ 1
⎪
⎩	4 – x		;x ≥ 1

1.Open the Function aplet.

Select

Function

2.Highlight the line you want to use, and enter the

expression. (You can press to delete an existing

line, or CLEAR to clear all lines.)

2

CHARS ≤

1

CHARS > 1

AND CHARS ≤ 1

4

CHARS > 1

Note: You can use the menu key to assist in the entry of equations. It has the same effect as pressing

.

3-12 Function aplet