Systems of Equations and Inequalities: Matrices and Determinants

Organizing Data Using Matrices

Now that we have gone through the basics of matrices, let’s work on how matrices are used to organize data. Suppose you have the following table:

 

Game A

Game B

Cans of Soda

5

10

Juice Boxes

7

44


This table represents the number of cans of soda and juice boxes sold at two basketball games at a local elementary school. We can now take this table and turn it into a matrix.

row 1 is Cans of Soda, row 2 is Juice Boxes    2 by 2 matrix, first row is 5, 10 and second row is 7, 44

Matrices are named with a capital letter while the entries are named with a small letter. Analyzing the matrix we see that g11 = 5, g12 = 10, g21 = 7 and g22 = 44.