Matrices and Matrix Operations: Background You’ll Need 2

  • Identify rows and columns

Before working with matrices, it’s important to understand the basic structure of how they are organized. A matrix is a rectangular arrangement of numbers, symbols, or expressions in rows and columns.

rows x columns

  • Rows go across (horizontally)
  • Columns go up and down (vertically)

A diagram showing a 3-by-3 matrix with its three rows highlighted horizontally on the left and the same matrix with its three columns highlighted vertically on the right.

element

Each value in a matrix is called an element.

 

The number of elements can be found by calculating [latex]rows \times columns[/latex]

 

Identify the number of rows, columns, and elements in the matrix:\begin{bmatrix}
2 & 5 & 7 \\
4 & 0 & -1
\end{bmatrix}