Warm-Up:
Use the table to answer to following questions.
1. How many units were imported to the United States
in 1996? In 2000?
2. How many more units were imported in 1998 than
in 1996?
3. How many more units were imported than exported
in 2000?
(4-1) Organizing Data
into Matrices
Objective:
To Identify matrices and their elements
To organize data into matrices
Matrices
•A matrix (matrices) is a rectangular array of numbers
written within brackets.
•You represent a matrix with a capital letter and classify it
by its dimensions.
•The number of horizontal rows and the number of vertical
columns determine the dimensions of a matrix.
• Each number in a matrix is an Element.
Write the dimensions of each matrix.
You can identify a matrix element by its position within
the matrix. Use a lowercase letter subscripts. The
subscripts represent the element’s row number and column
number.
Energy Energy is often measured in British thermal
units (Btus). Write a matrix to represent the data below.
Estimate the values from the graph.
Solution:
Countries
Production Consumption
[
]
TRY THIS:
a. Rewrite the matrix as a 2 x 3 matrix. Label the rows and
columns.
TRY THIS:
Three students kept track of the games they won and
lost in a chess competition. They showed their results
in a chart. Write a 2 x 3 matrix to show the data.
Gymnastics The table below shows scores from the
2004 Olympics in Athens, Greece.
a. Write a matrix W to represent the information.
Use a 4x4 matrix
Solution:
Assignment
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