TI-85 Program:  TRAPEZOI

This program will approximate the area of the region
bounded by the x-axis, the curve y = f(x), x = a, and
x = b using n trapezoids.  You can view the results 
both graphically and numerically or numerically only.


1. Before you run the program, store f(x) in y1 and 
   set the desired graph window.
2. Run the program, respond yes to question if you 
   did step 1, otherwise no and do step 1.
3. Respond to Display graph option.
4. Work your way across the menu, set the bounds 
   (Bnds), set the number of trapezoids (N), and 
   calculate the sum (CONT).
5. Program will display the curve and the trapezoids.
   You can toggle between the sum and the graph.

Return will allow you to go back to the previous menu,
Exit will quit the program.

Note:  The INTEGRAT program calls this program.

Last updated: 2/9/98