To rotate the graph, click on the image and drag. To stop the rotation,
click once in the box containing the graph.
To zoom out, click the "rocket ship" button.
To zoom in, first rotate the graph so that you are looking down on it from
above. Click the "knife" button and then click and drag over the
portion of the image that you would like to enlarge. When you release
the mouse button, the graph will zoom in.
To change the formula for the function, click and drag over the expression
(not including the
z ). Backspace to delete the entire expression,
and then type your new expression. Here are some additional hints:
Use the ^ key for powers.
Use * to indicate multiplication. (This
is essential; however, you will not see the asterisk in your expression.)
Use "sqrt" for square root. (This will be changed to the square root symbol
As soon as you type a left parenthesis, the matching right parenthesis
will be supplied automatically.
The size of the cursor (the vertical line) will help you figure out whether
you are on the main line or on the exponent line.
You may have to point with the mouse and click, to move from exponent to
main line and vice versa.
If, after entering a new formula, the page says "Cannot draw this graph,"
try clicking in the space where the graph should appear. If your
formula makes sense, this should cause the graph to be drawn.
If your mathematics gets hopelessly messed up, simply click RELOAD (or
REFRESH) on your browser, and try again.