Agenda

• create scatter plot
• modify symbol
  • color
  • shape
  • and shape
• add horizontal & vertical lines
• fit regression line

Intro

A scatter plot displays the relationship between two continuous variables. In ggplot2, we can build a scatter plot using geom_point(). Scatterplots can show you visually

• the strength of the relationship between the variables
• the direction of the relationship between the variables
• and whether outliers exist

Scatter Plot

plot(mtcars$disp, mtcars$mpg)

Title & Axis Labels

plot(mtcars$disp, mtcars$mpg,
     main = 'Displacement vs Miles Per Gallon',
     xlab = 'Displacement', ylab = 'Miles Per Gallon')