1. TAKE THE MYSTERY OUT OF MATRICES WITH THE GRAPHING CALCULATOR!

2. With a graphing Calculator
it is easy to:
ADD/SUBTRACT
MULTIPLY
DETERMINATES
INVERSES
SOLVE SYSTEMS

3. THE IMPORTANT KEYS
QUIT
ARROW
2ND
CLEAR
MATRIX
OPERATIONS
ENTER

4. Keystrokes for a Matrix
3x3 matrix
2nd, Matrix
Type in the numbers of matrix, enter after each number
Arrow to right to edit [A];
And Enter:
YOU DID IT!
Now 2nd, Quit, Clear when finished

5. REPEAT WITH THE SECOND MATRIX
3x3 matrix
Type in the numbers of matrix, enter after each number
Arrow to right to edit, down to 2 [B]
And Enter:
Now 2nd, Quit, Clear when finished

6. ONLY ONE MORE MATRIX 2nd, Matrix 3x1 matrix
Type in the numbers of matrix, enter after each number
Arrow right to edit; down to 3 [C];
And Enter:
Now 2nd, Quit, Clear when finished

7. but use a different operation like multiplication.
To Add-Subtract-Multiply
2nd, Matrix, 1 for [A]
Type the operation +
2nd, Matrix, 2 for [B]
Enter
Now try again
but use a different operation like multiplication.

8. To Find a Determinate 2ND, Matrix Arrow Right to Math
Enter: for No.1 Determinate
2nd, Matrix No. 2 for [B]
Enter for Determinate

9. TO FIND THE INVERSE
2nd, Matrix, 1 for [A]
Hit key
Enter for Inverse

10. TO SOLVE A SYSTEM OF EQUATIONS
Type in the coefficient Matrix
(This is Matrix A)
Type in the Answer Matrix
(This is Matrix C)

11. TO SOLVE A SYSTEM OF EQUATIONS
Type in Inverse of A
2nd, matrix, 1,
Type Multiply
Type in the Answer Matrix [C]
2nd, Matrix, 3
Type enter

12. TO SOLVE A SYSTEM OF EQUATIONS
IT’S SOLVED!
X =
Y =
Z = 4 3 1

13. The mystery of the Matrix is solved.
Go out and show your students the wonder of the matrix in a graphing calculator. It makes it easy to work those hard to do problems
They can: *Add/Subtract
*Multiply
*Find determinates
*Find Inverses
*Solve those 3 variable equations easily
They will thank you forever and ever unto Calculus.

14. TAKE THE MYSTERY OUT OF MATRICES WITH THE GRAPHING CALCULATOR!By
Sharon Trogdon
Union Intermediate High School
Screen shots were of a TI-83+ graphing calculator.
Thanks to TI for the TI Connect software and pictures of the calculator.