Grapher 3.3  Information

   Grapher is a function graphing program, intended as a low-cost (but
powerful) tool for students and researchers.  Functions are entered in the
standard BASIC notation (e.g. 2*x; cos(x^3); 3*x-sqrt(x)) with the usual
order of operations assumed.  Several functions may be graphed on the same
set of axes.  The program is shareware ($8 per individual, $25-$35 site
license).  Registered users will receive updates upon request.

   The program supports the standard menus for saving and loading files,
printing, and copying graphs as PICT graphics to the clipboard.  Other
features include zooming in on parts of the graph, zooming out, and
locating solutions and intercepts.

   The author is Tom Rona, 13210 42nd Ave NE, Seattle, WA. 98125, USA.  The
program is written in Think C ¨ (Symantec Inc.) using the Think Class
Library ¨.

Entry: Type a function, or several functions, separated by semicolons, 
e.g.  2*x;  cos(x^3); 3*x-sqrt(x), and click "Draw".  The functions will
all be graphed.

Symbols: You may use any of these: /  *  +  -  )  (  <any digits>  
<spaces>  <decimal point>

Functions: You may use any of the functions from the "Use" pop-up menu. 
This menu will insert the chosen function at the cursor. You may also type
the function yourself.

Zooming: To zoom in on an area of the graph, select a rectangle with the
mouse.  The new domain and range will be shown.  Then click on the "Draw"
button. To zoom out, click the "Zoom Out" button.  The new domain and range
will be shown.  Then click on the "Draw" button.  You may also type in the
domain and range directly.

Copying: To copy the graph to the clipboard, select an area of the graph
with the mouse, or use "Select All" from the "Edit" menu.  Then use "Copy"
from the same menu.

Coordinates: To show the coordinates of any point, click on that point. 
The coordinates will be displayed in the domain and range boxes.