1. WarmUp 2-3
on your calculator or
on paper.

2. Model data using matrices Add, subtract and multiply matrices

3. Modeling Real-World Data with Matrices
Lesson 2-3
Modeling Real-World Data with Matrices
How do you add, subtract, and multiply matrices with and without scalars?
Vocabulary
Matrix
Dimensions of matrices
Scalar

4. Matrices
A matrix is an array of elements with dimensions given in rows x columns

5. Modeling with matrices

6. Addition, Subtraction & Scalars

7. Matrix Multiplication # columns in first must equal # rows in second

11. SUMMARIZING…turn to a partner, take turns describing the following…
How to determine the dimensions of a matrix
What a scalar is and how do we use it
When can you add and subtract matrices
How do you add and subtract matrices
When can you multiply matrices
How do you multiply matrices