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Matrices

Matrices. Guiding Question: How can we use matrices to display data for charts?. Matrix Vocabulary. Dimension : written as m x n. m is the number of rows and n is the number of columns. Example: there are 2 rows and 3 columns so the dimensions of the matrix would be written as 2X3

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Matrices

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  1. Matrices Guiding Question: How can we use matrices to display data for charts?

  2. Matrix Vocabulary • Dimension: written as m x n. m is the number of rows and n is the number of columns. • Example: there are 2 rows and 3 columns so the dimensions of the matrix would be written as 2X3 Entry: each value in a matrix ex: 2, 4, 7, 5, 6, 8

  3. Matrix Vocabulary Continued • Address: the location of an entry in a matrix. This is expressed by using the lowercase matrix letter with the row and column number as subscripts. • Example: =A • Matrix A • The number 6 is located at row 2 and column 2 in matrix A, therefor, it is written as a22

  4. How can we write the location of a number in a matrix? • M= • What are the dimensions of M? • What is the entry of m32? • The entry 0 appears at what two addresses?

  5. Using data to write a Matrix Use the package data above for the costs of the packages given. Display the data in matrix form. What are the dimensions of C? What is the entry at c12 4. What is the address of the entry .005?

  6. Adding and Subtracting Matrices • To add or subtract two matrices, add or subtract the corresponding entries. You may add or subtract two matrices ONLY if they have the SAME dimensions:

  7. Page 251, 18 and 20

  8. Page 250: 2-16 even

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