E-mail Webmaster


Recent Additions

Frank's Letters

English Section

Math Tutorials

TI Graphing Calculators
Mobile Phones & Pads

TI Program Descriptions

TI Programs
TI Programming Keystrokes

Python Programs

Brief User Guides

TI-82 User Manual
TI-83+ User Guide

TI-89 User Guide


TI-82 Statistics
TI-83 Plus Statistics
TI-84 Statistics
TI-89 Statistics

Other Topics
TI-83Plus Finite Math
TI-83 Plus Finance Math
TI-83 Plus Busines & Economics
TI-83 Plus Lin Prog
TI-83 Plus Geometry
TI-84 Conics APP
TI89 Calc Dif Eq
TI-89 Finance
Arithmetic of  Lists
TI-89t Busines & Economics


For Beginners
More Detailed Page 1
More Detailed Page 2
TI-89 FAQs

Links to  Guidebooks by TI
TI-83 Plus

Casio Graphing    Calculator

Casio Program Descriptions

Casio Programs
CFX-9850 & CFX-9750

Brief  Guides

CFX-9850 & CFX-9750
User Manual

Statistics Guide

Casio Programming Keystrokes
Brief Guides Other Calculators
HP 43S Calculator

Scientific Calculators
FAQs for Scientific Calculators


Sección Española

FAQs en Español
FAQs Basicos
Mas Dificil Pagina 1
Mas Dificil Pagina 2

Guías en Espaňol
TI-82 Espanol
TI-82 Estidisticas
TI-83 Plus Espanol
TI-83 Plus Estidisticas
TI-83 Plus Guía Financiera
TI-89 Titanium Guía
TI-89 Estidisticas
TI-89 Guía Financiera


Casio Calculadoras

Breve Guía Español
Cfx-9850 & Cfx-9750

Casio FAQs en Espanol

Calculadoras Científicos

FAQs en Espanol
Programs at Other Sites

Links to Tutorials


Graphing Inequalities with the TI-82

About this program:  ( tiineqgraf ):  This program simplifies graphing inequalities for the TI-82.  The user enters the right side of the inequalities (up to three) in the Y= area as usual.  Then after starting the program, the user tells the calculator whether to shade above the line or below the line.  After each of the first two inequalities, the user is asked whether to quit or graph another inequality.

DISCLAIMER:  This program is free, and, therefore, I make no claims about it's efficacy, efficiency, or proper operation.  If you find a problem with this program, or can suggest an improvement, please e-mail me at knosummath@aol.com  .

Use of this Program:  You may use this program freely for your own personal use and for the use of other students, but use for publication or any means of profit requires my permission.

Memory Usage:  This version of the program uses 322 bytes of memory. I estimate it will take an inexperienced programmer about 15 minutes to enter by hand.

Revisions:  Version:  V1.0  Date:  3/27/05. 

:Disp "F. Kizer", "V1.0 3255"
:Disp "INEQUAL(S) in Y="
:Lbl 4
:Menu("Choose","GRPH 1ST INEQ",1,"GRPH ANOTHER",2,"DONE",3)
:Lbl 1
:Lbl 2
:Input "3 BELO, 4 ABOV ",I
:If I=3 and C=1
:Shade(Ymin,Y1, 2,Xmin, Xmax
:If I=4 and C=1
:Shade(Y1,Ymax, 2, Xmin, Xmax
:If C<2
:Goto 4
:If I=3 and C=2
:Shade(Ymin,Y2, 3,Xmin, Xmax
:If I=4 and C=2
:Shade(Y2,Ymax, 3, Xmin, Xmax
:If C<3
:Goto 4

:If I=3 and C=3
:Shade(Ymin,Y3, 5,Xmin, Xmax
:If I=4 and C=3
:Shade(Y3,Ymax, 5, Xmin, Xmax
:Lbl 3