Matrix Elements and Dimensions

The video tutorial introduces matrices as rectangular arrays of data organized in rows and columns. It explains how to identify the dimensions of a matrix and provides examples of creating matrices from data. The tutorial also covers how to identify specific elements within a matrix by their row and column positions, using practical examples to illustrate these concepts.

What is a matrix?

• A linear sequence of numbers

• A circular arrangement of numbers

• A rectangular array of data

• A single number

How are the dimensions of a matrix identified?

• By the sum of rows and columns

• By the number of rows by the number of columns

• By the number of columns by the number of rows

• By the number of elements

In the example, who is represented in the first row of the matrix?

• Eva

• Sue

• John

• Ava

How many B's does Sue have in her row?

• Four

• Three

• Six

• Five

What is the element at the first row, second column in the example matrix?

• 5

• 9

• 3

• 2

Which element is located at the third row, second column?

• 9

• 5

• 2

• Negative 5

What is the element at the first row, third column?

• 0

• Negative 2

• 5

• 9

Where is the element '4' located in the matrix?

• First row, fourth column

• Third row, first column

• Third row, fourth column

• Second row, first column

What are the dimensions of a matrix with three rows and four columns?

• 2 by 3

• 3 by 4

• 3 by 2

• 4 by 3

What is the element at the second row, first column?

• 2

• 0

• 5

• 9