Question

determine the order of a matrix
score: 2/5 penalty: none
question
determine the order of the following matrix:
$\begin{bmatrix}7&-7\\5&2\\3&8end{bmatrix}$
answer attempt 1 out of a
answer: $square \times square$
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Explanation:

Step1: Count matrix rows

The matrix has 3 horizontal rows:

$$\begin{bmatrix}7&-7\end{bmatrix}$$

,

$$\begin{bmatrix}5&2\end{bmatrix}$$

,

$$\begin{bmatrix}3&8\end{bmatrix}$$

.

Step2: Count matrix columns

The matrix has 2 vertical columns:

$$\begin{bmatrix}7\\5\\3\end{bmatrix}$$

,

$$\begin{bmatrix}-7\\2\\8\end{bmatrix}$$

.

Step3: Define matrix order

Matrix order is $\text{number of rows} \times \text{number of columns}$.

Answer:

$3 \times 2$