Matrices

What is a matrix?

• A matrix is a rectangular array of numbers or symbols arranged in rows and columns.

• A matrix is a collection of random letters.

• A matrix is a type of graph.

• A matrix is a single number.

Can a matrix have letters in it?

• Letters can only be used in a vector, not a matrix.

• Yes, a matrix can have letters in it.

• A matrix can only have symbols, not letters.

• No, a matrix can only contain numbers.

How many rows does a 2x3 matrix have?

• 2

• 4

• 3

• 1

What do we call the numbers in a matrix?

• coefficients

• elements

• constants

• variables

Is a matrix the same as a list?

• A matrix is a type of list.

• Yes, a matrix is the same as a list.

• A list can be represented as a matrix.

• No, a matrix is not the same as a list.

Can we add two matrices together?

• No, only if they are square matrices.

• Yes, but only if they are of different sizes.

• No, matrix addition is not possible.

• Yes, if they have the same dimensions.

What shape does a 1x4 matrix have?

• 4 rows and 1 column

• 2 rows and 2 columns

• 1 row and 4 columns

• 1 column and 4 rows

How many columns does a 3x2 matrix have?

• 1

• 3

• 2

• 4

Can a matrix be empty?

• An empty matrix is not a valid mathematical concept.

• Yes, a matrix can be empty.

• No, a matrix cannot be empty.

• A matrix must always contain at least one element.

What is the size of a matrix with 4 rows and 1 column?

• 4x1

• 1x1

• 4x4

• 1x4