This applet will demonstrate the basics of linear functions.
Slider a will vary the slope of the line.
Slider k will vary the vertical translation of the line.
The check boxes will turn on up to 3 points for you to calculate the slope of the line.
The slope check box will allow you to check your slope.
The y=x check box will graph the parent curve with the current line.
The full linear equation is displayed at all times.

This applet can be used by teachers in a demonstration mode in the classroom or teachers can have students load it on their own computers with a worksheet to be complete for a grade.