To Graph an Equation
BEGINNING TI 83/84+ CALCULATOR USE
2nd ANS
Inserts answer from last calculation
2nd ENTER
The last calculation appears so it can be edited
You can continue to do this and go back several entries
To Graph an Equation
Y=
(Make sure your PLOTS are turned off – Put cursor on PLOT and hit ENTER)
Enter in equation
GRAPH
Y= Options
To turn off the equation
Put cursor on the equals and hit ENTER
To change type of line
Put cursor on the slash to left of Y= and hit ENTER
To Change a Window
WINDOW
Enter in new dimensions
TRACE
Option 1:
Enter equation into Y=
GRAPH
TRACE
Left/Right cursor keys move cursor up/down line
Up/Down cursor keys jump from one equation to another
Option 2:
Enter equation into Y=
GRAPH
TRACE
Type in x-coordinate (at bottom of screen)
ENTER
y-coordinate will appear
ZOOM Menu
1:ZBox
Allows you to draw a box around a section of your graph
-Place cursor at corner of section wanted
-ENTER
-Move cursor with arrow keys
-Hit ENTER when box is made
-Hit ENTER to zoom in
2:Zoom In
3:Zoom Out
Allows you to center in on a section of the graph
-Place cursor where you want to zoom
-ENTER
4:ZDecimal
When using TRACE, all values generated are to 0.1
6:ZStandard
Sets your window -10 to 10
7:ZTrig
Sets x-axis to degrees (count by 90) and y-axis counts by 1
8:ZInteger
When using TRACE, only integer values are generated
9:ZoomStat
Used to graph ordered pairs
0:ZoomFit
Helps generate a window to see the graph.
Once you can see the graph, use WINDOW to adjust it
2nd CALC Menu
When referring to Left and Right Bounds, imagine a vertical line at the point in question. Place cursor to the left of the line and hit ENTER. Then place cursor to the right of the line and hit ENTER. When asked to Guess?, hit ENTER
2:zero
Finds intersection of graph and x-axis
3:minimum
Finds coordinates of minimum on selected part of graph
4:maximum
Finds coordinates of maximum on selected part of graph
5:intersect
Finds coordinates of intersection of two graphs
To Graph Ordered Pairs
STAT
EDIT
1:EDIT
Clear data from lists
Put cursor on L1 and hit CLEAR ENTER
If you accidentally hit DEL the List will disappear
To put it back in
Put cursor on L2 – 2nd INS – 2nd (List Name) - ENTER
Enter in data
2nd STAT PLOT
Turn on Plot 1 – ENTER
Hit ENTER to select options, and cursor keys to move around in this menu
ZOOM
9 ZOOMSTAT
(Make sure you don’t have any equations in Y=}
STAT Menu
1:1-Var Stats
Generates statistical information about the data in the list
If the data is in L1, then just hit ENTER
If it is not, then you must type in the list name
2:2-Var Stats
Generates statistical information about the data in two different lists
If the data is in L1 and L2, then just hit ENTER
If it is not, then you must type in each list name, separated by a comma
Regression Choices
Generates an equation to fit the data.
To Get Equation for Linear Regression (Line of Best Fit)
Enter in ordered pairs (see above)
STAT
CALC
4:LinReg(ax + b)
If your x-coordinates are in List 1 and your y-coordinates are in List 2, then just hit ENTER
If your coordinates are in any other Lists, you must enter each one in separated by a comma
The lists are above the numbers – 2nd then the number
Comma - the key about the 7
To Generate Ordered Pairs from an Equation
Enter Equation into Y=
2nd TBLSET
TblStart= Choose what value to start with
Delta TBl = Choose what you what to count by
Indpnt: Refers to x value
Depend: Refers to y value
Auto – ordered pairs automatically generated
Ask – coordinates appear only when you hit ENTER
2nd TABLE
2nd Format Menu
Allows you to change the attributes of your graph
2nd LIST Menu
OPS
For each choice, enter in the List Name that you want to work with
1:SortA(
Sorts the list in ascending order
2:SortD(
Sorts the list in descending order
3:dim(
Returns the number of elements in the list
6:cumSum(
Generates a running total of the values in the list
7: List(
Calculates the difference in successive terms in the list
MATH
Allows you to perform calculations on the values in your lists
2nd CATALOG
Displays all of the functions on the calculator
DiagnosticOn
It generates the Correlation Coefficient and displays it when you find a regression equation (r). It only needs to be turned on once and will stay on unless turned off.
2nd Catalog
DiagnosticOn
ENTER
ENTER
STO
Allows you to store values in lists or variables
Example
2nd L1 *3 STO 2nd L2 (Multiplies values in L1 by 3 and stores them in L2)
3 STO ALPHA A (Assigns the letter A the value of 3)
To Darken or Lighten Screen
2nd Up Cursor to darken
2nd Down Cursor to lighten
To Work with Matrices
To enter in data
MATRIX
EDIT
Place cursor on Matrix you want to edit and hit ENTER
Type in dimensions – the ENTER key and the cursor keys move you around
To use a matrix
Get out of the MATRIX menu (2nd QUIT)
MATRIX
NAMES
Select the matrix you want and hit ENTER
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