- create scatter plot
- modify symbol
- color
- shape
- and shape

- add horizontal & vertical lines
- fit regression line

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

`plot(mtcars$disp, mtcars$mpg)`

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