Line and Linear Inequality Graphing in Java

Line and Linear Inequality Graphing:

This applet is copyright (©) Dec. 2006, Ian Vogt. Permission to use, copy, and distribute this applet for non-commercial purposes without written permission is granted provided this copyright notice is preserved on all copies. This applet is provided "as-is" without any warrantee.

To draw a line:

Move the mouse cursor to the first point on the line.
Press and hold the left mouse button.
Drag the mouse cursor to the second point. You will see a "rubber band" line from the first point.
Release the mouse button. The program will draw a line between and beyond the two plotted points

You may create as many lines as you want. To create a broken line, first check "Broken Line" checkbox.

To delete the last line drawn click the right mouse button (or hold the Ctrl key while you click the left button) anywhere on the graph paper.

To change the scale of the axes, click on the "Select Scale" pull-down field and change to the desired scale.

For graphs of inequalities you can add shading to the graph:

Select the "Shade" button.
Move the mouse cursor to the side of the line(s) to be shaded and click.

Shading will appear on that side of the line(s) and a blue dot is plotted on the location you clicked. For example, you should click on the test point you used to determine which side to shade. You can create an unlimited number of shaded areas. To remove the last shading created, click the right mouse button when the "Shade" button is selected.

To paste the graph into a document (e.g. MS Word):

Click the "Copy to Clipboard" button. Then switch to the document and press Ctrl-v or Edit->Paste.

If access to the system clipboard is blocked the button changes to "NO ACCESS" and you have to use this procedure:

With the graph displayed in your browser window, press the Ctrl-Alt-Shift-PrtSc key combination (that is, all at the same time).
Go to your document and press Ctrl-v to paste an image of your browser window into the document.
Use MS Word's picture crop and size adjustment features to get just the graph included at the right size:
- Click on the graph and a "Picture Toolbar" should appear. If not, right-click the graph a select "Show Picture Toolbar".
- Click the "Crop" button and move the lines around the picture until just the graph is showing.
- Click the "Crop" button again to unselect it and move the lines around the picture until it is the right size.