A scatter matrix is a type of graph that helps us analyze how two different variables move together. It is made up of a bunch of little dots that represent the different combinations of two variables (x and y). For example, if you wanted to see how two pieces of data, like income and age, are connected, you could use a scatter matrix. Each dot would represent a person, and the amount of money they make (x-axis) and their age (y-axis). The scatter matrix can help us understand the relationship between the two pieces of data and how they may affect each other.