3.1 Introduction3.2 Factor Variable3.2.1 A bar graph3.2.2 Add axes labels and a title3.2.3 Other graphs of a factor3.3 Saving Graphs3.4 Dot plots3.5 Numeric Variable: Stripchart and Histogram3.6 Two Numeric Variables3.6.1 Scatterplot3.6.2 Building a graph, step-by-step3.7 A Numeric Variable and a Factor Variable3.7.1 Parallel stripcharts3.7.2 Parallel boxplots3.8 Comparing Ruth, Aaron, Bonds, and A-Rod3.8.1 Getting the data3.8.2 Creating the player data frames3.8.3 Constructing the graph3.9 The 1998 Home Run Race3.9.1 Getting the data3.9.2 Extracting the variables3.9.3 Constructing the graph3.10 Further Reading3.11 Exercises