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INVESTIGATION 12
Online Connection www.SaxonMathResources.com
Below is a matrix for the ticket prices.
⎡5 7⎤ ⎢6 8 ⎣9 11⎦
Notice that the entries in the table above correspond to the elements in the matrix.
Fundraiser Thetablebelowshowsthenumberofitemssoldduringthefirst day of a school fundraiser.
Items Sold on First Day
1. Model Use the data in the table to create a matrix that represents the situation.
2. Explain how to use the matrix to calculate the total number of sweatshirts sold during the first day of the fundraiser. How many sweatshirts were sold?
The dimensions of a matrix with m rows and n columns are m × n. Each element has a specific position in the matrix that is relative to its row and column.
Complete the statements. Refer to the matrix of the number of items sold during the school fundraiser’s first day.
3. The matrix has rows and columns. 4. The dimensions of the matrix are .
826 Saxon Algebra 1
Investigating Matrices
The table shows the price of tickets sold at a local movie theater.
Use a matrix to organize data, such as the price of movie tickets. A matrix is a rectangular array of numbers in horizontal rows and vertical columns. Each number in a matrix is called an element. An element is any individual object or member belonging to a set.
Type
Matinee
Regular
Child
$5
$7
Student
$6
$8
Adult
$9
$11
Materials
• graph paper
• graphing calculator
Item
Medium
Large
T-shirts
10
7
Hats
3
2
Sweatshirts
4
9