Introduction to Matrices

What is a Matrix?

• An equation of over 5 numbers or symbols 

• A set of numbers in rows and columns

• A method of finding the n^th value of a series

• A complicated number system

What is the name of each entry of a matrix?

• Row

• Element

• Dimension

• Rectangle

What is the value of element a₂₃?

• 2

• -1

• 6

• 1

How many columns are in a 5 x 4 matrix?

• 5

• 4

• 20

• 9

What is the value of element a₄₂?

• 2

• -1

• 6

• 1

In Matrix R (pictured) what is the value of element R_3,2

• 8

• 9.01

• 6

• 1

What are the dimensions of this matrix?

• 2 x 3

• 3 x 2

• 6 x 1

• 1 x 6

What is the value of element a₂₅?

• 2

• -1

• 6

• undefined

How many rows are in a 7 x 3 matrix?

• 7

• 3

• 21

• 10

Dimensions?

• a

• b

• c

• d