Intro to Matrices Flashcard

Front

What is a matrix?

Back

A rectangular arrangement of numbers in rows and columns.

Front

What are the dimensions of a matrix?

Back

The dimensions of a matrix are given in the format 'rows x columns'.

Front

What are the rows in a matrix?

Back

The horizontal lines of numbers.

Front

What does the notation '3 × 2' mean for a matrix?

Back

It means the matrix has 3 rows and 2 columns.

Front

What are the individual values inside a matrix called?

Back

Entries.

Front

How do you add two matrices?

Back

You add corresponding entries from each matrix.

Front

What is a square matrix?

Back

A matrix with the same number of rows and columns.

Front

What is a zero matrix?

Back

A matrix in which all entries are zero.

Front

What is the identity matrix?

Back

A square matrix with ones on the diagonal and zeros elsewhere.

Front

How do you multiply a matrix by a scalar?

Back

You multiply each entry of the matrix by the scalar.