Introduction to the matrix  Matrices  Precalculus  Khan Academy  Summary and Q&A
TL;DR
Matrices are rectangular arrays of numbers that are widely used in computer science for simulations and constructing computer graphics.
Questions & Answers
Q: What is a matrix?
A matrix is a rectangular array of numbers used in computer science and computer graphics for simulating and constructing things.
Q: How are the dimensions of a matrix determined?
The dimensions of a matrix are determined by the number of rows and columns it has. For example, a matrix with 2 rows and 3 columns is called a 2 by 3 matrix.
Q: What are matrices used for in computer graphics?
Matrices are used in computer graphics to represent information such as color intensity or the presence of an object at a certain point.
Q: How can matrices be manipulated?
Matrices can be manipulated using algebraic operations like multiplication, addition, and finding the inverse. These operations allow for efficient computation and simulations in various fields.
Summary & Key Takeaways

Matrices are rectangular arrays of numbers used in computer science and computer graphics for simulating and constructing things.

Matrices have rows and columns, and their dimensions are represented as "x by y" where x is the number of rows and y is the number of columns.

Matrices are valuable for representing information in a compact way and can be manipulated using algebraic operations like multiplication and addition.