Math 141: Readings for January 28, 2026

Before coming to lecture today, please read the following material:

• MD 2.1 - 2.3 (except 2.1.3 and 2.1.4)

Note: These sections have a couple mentions of R code and the ggplot2 R package. Don’t feel that you need to run the code when instructed - just follow along with the provided text. It’s okay if references to R code are unfamiliar to you - focus on the overall discussion about the data being presented and visualized.