The TI-83 Calculator

Bruce Thomas

Mathematics Department

Kennesaw State Universitybthomas@kennesaw.edu

Outline of the Tutorial

The basic TI-83 keys The home screen and PEMDAS Important special keys Discrete functions: lists and scatter plots Continuous functions: equations and

graphs Modeling discrete data Questions and answers

Basic TI-83 Keys

On Multifunction keys Screen brightness Negative vs. subtract

(-) -

Arithmetic operations

Clear vs. Quit

The Home Screen and PEMDAS It’s a calculator!

6 + 3 * 4 = 18 It remembers stuff!

ENTRY (2nd ENTER)ANS (2nd (-)) STO

It changes stuff!DEL INS (2nd DEL)CLEAR

The Home Screen and PEMDAS

PEMDAS rules!Parentheses

Exponents

Multiply

Divide

Add

Subtract

The Home Screen and PEMDAS PEMDAS rules!

ParenthesesExponentsMultiplyDivideAddSubtract

Parentheses are very, very, very, very, very important!!!

Important Special Keys ^ (exponentiation) x2 (squaring) x -1 (multiplicative

inverse) (pi) e (engineer’s constant) ex (power of e) (cursor keys) (square root)

Discrete Functions: Lists

Standard lists: L1, L2, etc Display like this: {4 -7 3 5} Whoops! ERR: INVALID DIM List Editor: STAT | EDIT Adding & deleting numbers in lists Don’t mess with the list names! But when you do: STAT | SetUpEditor

Discrete Functions: Scatter Plots

Use the STAT Editor to put the “x” and “y” data into two lists (L1 and L2, usually)

Press STAT PLOT (2nd Y=) Choose a plot (usually #1) to turn on;

choose the first type; make sure it specifies the correct lists (L1 and L2, usually); choose the first mark

Make sure the other plots are turned off Press ZOOM, then press 9 (ZoomStat)

Discrete Functions: Scatter Plots

Use WINDOW to adjust the horizontal and vertical extents

Use TRACE to turn on the blinking spider With TRACE turned on, use the and

keys to jump the spider from data point to data point.

Use QUIT (2nd MODE) to get back to the Home screen

Continuous Functions: Equation

Press Y= to access the equation editor Press to toggle off any active plots Choose which slot (Y1, Y2, etc.) to use Turn off other equations by using the key

to move the cursor over the = sign, then press the ENTER key (only active equations with their = sign in bold will be graphed)

Continuous Functions: Table

Use TBLSET (2nd WINDOW) to prepare a table• Set a starting value for the “x” and an

increment value• Set “Indpnt” and “Depend” to AUTO

Press TABLE First column is for “x”, other column(s) for any

active equations Use and to scroll up and down in the table

Continuous Functions: Table

-- OR –

If you want to only see the results (“y”) for several specific values of “x”, then

Use TBLSET and specify ASK (instead of AUTO) for the “Indpnt”

Leave everything else the same Press TABLE Key in your specific “x” values in the first column

Continuous Functions: Graph

If the graph isn’t shown when you press the GRAPH key, then

Press WINDOW and specify appropriate values for XMIN, XMAX

Press ZOOM then 0 (ZoomFit) and the TI-83 will choose appropriate values for YMIN and YMAX

Modeling Discrete Data Put data into lists L1 and L2,

then display the scatter plot with ZoomStat

Press STAT then and choose appropriate type of model (LinReg, QuadReg, etc.) then append the equation name Y1 (press VARS then then 1 and 1)

Press GRAPH

Questions and Answers

Bruce Thomas

Mathematics Department

Kennesaw State Universitybthomas@kennesaw.edu