To Make Display Darker: [2nd] [up arrow]  (repeat as needed)

To Make Display Lighter: [2nd][down arrow] (repeat as needed)

(battery stength is indicated by the number in the upper right corner. 9 is the weakest indicating its time to change batteries)

To enter a negative number         - 3     (gray negative (-) key)

To subtract two values                 5 – 3  (blue subtraction key)

To redisplay the previous calculation: [2nd][ENTER]  [ENTRY]

To retrieve the answer to the previous problem:  [2nd] (-)  [ANS]

To Graph:
                        .

• Y=    (upper left corner)
• CLEAR    to erase any previous equations
• Type in equation.  Use the division key for the / and the variable is entered usining the [X,T,O,n]  key
• GRAPH

                .

To Change Graph Window:

Pre-set values:

ZOOM 6: Standard [-10, 10] by [-10, 10]        ZOOM4: Decimal [-4.7,4.7] by [-3.1, 3.1]

Any values you wish to enter: WINDOW

[Xmin, Xmax] by [Ymin, Ymax]
 
 

To Find Values on the Graph:

TRACE    (cursor is displayed with coordinates at the bottom)
Use arrows to move cursor left or right on the graph

Enter a number to move to a specific point (Not with TI-82)

or

[2nd]TRACE[CALC] 1: value
enter value for x

To Generate a Table of Values: Enter equation(s) using Y=

Set up table by using [2nd]WINDOW[TBLSET]         View table by using [2nd]GRAPH[TABLE]

                                 .
D Tbl is the change in the x values
 

To Find Special Points on a Graph:

y = x³–7x + 2

• [2nd]TRACE[CALC] 2: zero
• move left of intercept, ENTER
• move right of intercept, ENTER
• move back close to intercept, ENTER

• [2nd]TRACE[CALC]  3: minimum
• move left of minimum, ENTER
• move right of minimum, ENTER
• move back close to minimum, ENTER

maximum:

• [2nd] TRACE [CALC] 4: maximum
• move left of maximum, ENTER
• move right of maximum, ENTER
• move back close to maximum, ENTER

                    .

intersection:

• enter equations for Y1 and Y2
• [2nd]TRACE[CALC] 5: intersect
• move close to intersection point with left or right arrows
• ENTER
• ENTER
• ENTER

Using Calculator Programs:

PRGM
Choose the program number you want to run
ENTER

Programs:

AMORT: calculates the monthly payment for a loan with compound interest

BALANCE: calculates the balance in an account with compound interest

EVALUATE: evaluates the function in Y1 for any x value entered

LINES: calculates the slope and y-intercept for two entered points or a point and a slope

NDERIV: calculates the value of Y1 and the derivative of Y1 for any x value entered
                (used in Calculus to find the slope of the line tangent to Y1 at the entered x value)

NINTEGR: calculates the value of the definite integral for Y1 – Y2
                (used in Calculus to find the area between the curves of Y1 and Y2)

QUADFUN: calculates the vertex and roots (x-intercepts or solutions) for a quadratic equation

Sharing Calculator Data and Programs:
 

Connect cable firmly to both calculators.

Both people:  [2nd] [X,T,O,n] [LINK]

Person that needs the data: Right arrow to RECEIVE and then ENTER

Person that has the data to send:

Select 1: All+… to send all of your data

Select 2: All-… to select items to send

Select 3: Prgm… to select programs to send

ENTER on the items to send

Right arrow to TRANSMIT and then ENTER

To Return to the Home Screen:

[2nd] MODE[QUIT]