Use matrices to represent data

What you'll learn

1. Identify the dimensions (rows × columns) of a matrix and use correct vocabulary (row, column, entry, dimension).
2. Locate a specific entry $a_{ij}$ in a matrix using row-column index notation.
3. Encode tabular real-world data as a matrix, identifying what rows, columns, and entries represent.
4. Construct and read a payoff matrix for a simple two-strategy game.
5. Construct and interpret an incidence matrix for a small directed network.