Explanation

Matrices are often used to organize real-world data.

Example:
Sales data for two stores over three days:

[ 10 12 15 ]
[ 8 14 20 ]

• Rows = stores

• Columns = days

Advantages:

• Compact

• Easy to analyze

• Easy to manipulate mathematically

Quiz

1. What do rows usually represent?

2. What do columns usually represent?

3. Why are matrices useful for data?

4. Can matrices store more than numbers?

5. Are matrices used in spreadsheets?

Answer Key

1. Categories or groups

2. Variables or time periods

3. Organization and efficiency

4. No (in math, numbers only)

5. Yes