Question

an electronics company records each type of entertainment device sold at three of their stores so that they can monitor their purchases of goods. the sales in a month are shown below. use a matrix to represent the given data.

\

$$\begin{tabular}{|c|c|c|c|} \\hline & radio & computer & mobile \\\\ \\hline shop 1 & 130 & 155 & 140 \\\\ \\hline shop 2 & 100 & 120 & 155 \\\\ \\hline shop 3 & 110 & 105 & 115 \\\\ \\hline \\end{tabular}$$

Explanation:

Identify the data structure

Using the Data Organization knowledge point
The table contains sales data organized by shops (rows) and products (columns):

• Rows represent Shop 1, Shop 2, and Shop 3.
• Columns represent Radio, Computer, and Mobile.

Determine the matrix dimensions

Using the Matrix Dimensions knowledge point

• Number of rows (shops): \(3\)
• Number of columns (products): \(3\)
• The resulting matrix dimensions are \(3 \times 3\).

Construct the matrix representation

Using the Matrix Representation knowledge point

$$ X =
LATEXBLOCK0
$$

Answer:

$$ X =
LATEXBLOCK0
$$