Texas Instruments TI-84 - Plus - Edition Graphing Calculator User manual

MATH SUMMER PACKET
INSTRUCTIONS FOR THE TI-84
CALCULATOR

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MATH SUMMER PACKET
INSTRUCTIONS FOR THE TI-84 CALCULATOR
I. Using your graphing calculator (Keystrokes below are based on using a TI 83-Plus or TI 84 Calculator):
A. Be able to do basic graphing
Press [𝒀 =] and enter the following equation: 6𝑥 + 5
o
Press Graph to view the graph
o
Your turn!
a) Graph
33
4
yx
b) Graph
2
2 3 3y x x  

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c) Find the intersection of the lines
1
3
yx
yx


using the intersection function on your calculator.
1. Solve the above Equations for y.
1
3
yx
yx

  
GRAPH BOTH EQUATIONS.
VIEW GRAPHS
PRESS 2ND TRACE THEN THE CALC MENU. Your screen should look like the one below.
PRESS 5FOR INTERSECT OR CURSOR DOWN AND PRESS ENTER.Your screen should now look like this:

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5. Press ENTER 3 times, (once at each prompt)
6. The xand ycoordinates appear at the bottom of the screen. You screen should look like the third one
above. The solution to the system is
 
1,2
d) Find values using tables.
GRAPH THE LINE
27yx
ACCESS THE TABLE BY PRESSING 2ND GRAPH. The table screen should look like the one below
3. You can move up and down using the arrow keys while on the table while the cursor is on the x-values.
e) To see the graph of
   
2
2 12 133f x x  
, you will need to set the window manually, using both your

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knowledge of functions and of the calculator.
In order to view the function on the left, first press ZOOM 6 and then ENTER. Your graph will look like the
one below.
Now, set your window by pressing the WINDOW key and changing the values to look like the ones
Below.
Your graph should look like the one above.
Be able to find the zeros, (also known as roots or x-intercepts) using the calculation menu.
Problem: Find the zeros of
 
2
226
3
f x x x   
.
1. Enter the function into the calculator. Be sure to press ZOOM 6 in order to go back to the standard screen.
2. Press CALC (2nd TRACE) to access the calculate menu
3. Press 2 (or cursor down) and hit ENTER for ZERO. Your screen will now look like this:

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3. Use the arrow keys to move the cursor close to where the function crosses the x-axis and press ENTER. Your
screen should now look like this:
4. Move cursor to the right of the zero and press ENTER again. Your screen should look like the one below.
6. Press ENTER a third time and the x and y coordinates of that x-intercept will be on the bottom of the screen.
D. Know how to use the Table Set function.

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1. Access the Table Set (TBLSET) function by pressing 2nd WINDOW. You can change the TABLE so that the
x-value increases by different increments. For example, cursor down to
____Tbl
and change the
number
0.5
. Then the independent variable will increase by
0.5
2. Go to the TABLE (2nd GRAPH) and confirm this.