Program: Interp2D
By: Ben Axelrod   


     What is interpolation?  2D interpolation takes two points and draws a
line through them.  Then it takes the X value you gave it (which is usually 
between these points but does not have to be) and uses this imaginary line 
to find the Y value there.  You could also give it Y to get X.  It doesnt 
mater.  In my program, if you enter Theta when it prompts for X, it will ask 
you for Y instead.  This allows you to enter Y and solve for X, without 
rearranging your points.  I did this by storing a value to Theta and then 
doing a Boolean test.  Just so you know, the specific value I used was 
10,000*PI+1.  If by some chance you want to enter this exact number, feel 
free to edit the program and change this value to better suit your needs.  

     I have 3 other interpolation programs that you should take a look at.  
If you have any questions or comments, please email me at: bmaxelro@syr.edu
