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	Visual Pro
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*My Thanks! :

Than you for choosing to download
my program! It's somewhat big
(around 2089 bytes). This is my
first submited program, so it's not
that good yet; I plan to improve it
in the future after I get some feedback.
The purpuse of this program is to
give rectagular approximations a
visual representation - hence the 
name. Included, are the three of the most
common rectagular approximation
methods used to find the area
under a function (LRAM, MRAM,
RRAM). Also, included are the
"Trapezoidal Rule" and "Simpson's
Rule." Simpson's Rule is by far the
most accurate because it's based
on an ancient Greek geometric
formula that can be used when
the top of a rectangle is defiened
be a parabola. I also included
two extra options on the second
menu called "PLOT POINTS" and
"SIGMA SUM." The "plot points"
program is useful if you want to
avoid the proccess of inputing
points into the list_1 and list_2
variables or use the less than
expidient list editor. The
"sigma sum" program will
sum an expression for you like:
 H
-----
\
/        1/(J^2) =(approx.) -> [pi]^2/6
-----
j=1

Remarks:
*The program will unfortunately regraph the
Y1 function again once you return to the menu;
I hope to fix this irritant in the future.
*The "PLOT POINTS" option in menu2 is the only
option that will exit from the program.
*The error that is given to you in the program is
calculated as a percentage. A positive error means
that the approximation that you computed is
an over estimate. A negative error means that the
approximation that you computed is an under estimate.
*Be warned: Do not try to get an approximation for a
function like F(x)=1/x over some discontinuous interval,
in this case that interval would be something like say
[-1,2], this is innaproriate because there is a vertical
asymptote at x=0 for the function F(x)=1/x.

Last Comment:
*The program is strait foward to use so there's really no
need explain how to it use. Please, post a review for this program
so I can improve upon it. Don't worry, really bad reviews or comments
wont hurt my precious feelings. Be brutal and honest.
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Upcoming Programs:
I plan to write other programs for the Ti-89, maybe a another
for the Ti-84plus but I have noticed the popularity of these calculators
has declined in recent times.
[Future Programs] ->
*[Ti-89] (zetaprime): This program will give you an estimate of the zeros in the
zeta funtion which can be useful if your counting primes.
*[Ti-89] (tensors): This program will let you deal with tensor quatities.
*[Ti-89] (4DGraph): As the name implies this program will let you visualise
a 4-dimensional plot in terms of its 3-dimensional components. (look for it
in May 2007)