Quadratic Relations

How to Use this Applet

Slider Definitions

<SHIFT>+drag: Hold down the <SHIFT> key, then drag the described object.
<CTRL>+drag: Hold down the <CTRL> key, then drag the described object.
<CTRL>+<SHIFT>+drag: Hold down both the <CTRL> key and the <SHIFT> key, then drag the described object.

The sliders change the parameters A, B, C, D, E and F in the quadratic relation y = Ax² + Bxy + Cy² + Dx + Ey + F = 0.

Select the "A", "B", "C", "D", "E" or "F" buttons or press the "A", "B", "C", "D", "E" or "F" keys to change to the selected parameter/slider.
The <LEFT> and <RIGHT> arrow keys can also be used to change the selected parameter/slider.
Drag the slider thumb to change the value of a parameter. Use the <UP> and <DOWN> arrow keys to increase or decrease the selected parameter. (Use the keys for fine adjustments.)
NOTE: If a key doesn't respond:
- position the cursor in the applet frame
- click the mouse button
- try the key again.
Drag a slider scale to change the range of the scale while maintaining the scale length.
Drag a location in a slider gutter towards or away from the thumb to change both the range of the scale and the scale length.
Select the corresponding parameter button to enter a value for a parameter.

<SHIFT>+drag in the graph area to move the entire coordinate system.
<CONTROL>+drag in the graph area, towards or away from:
- the x-axis, to change the y-axis scale.
- the y-axis, to change the x-axis scale.