Exercise

Visualizing each explanatory variable

Being able to see the predictions made by a model makes it easier to understand. In the case where there is only one explanatory variable, ggplot lets you do this without any manual calculation or messing about.

To visualize the relationship between a numeric explanatory variable and the numeric response, you can draw a scatter plot with a linear trend line.

To visualize the relationship between a categorical explanatory variable and the numeric response, you can draw a box plot.

taiwan_real_estate is available and ggplot2 is loaded.

Instructions 1/2

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  • Using the taiwan_real_estate dataset, plot the house price versus the number of nearby convenience stores.
  • Make it a scatter plot.
  • Add a smooth linear regression trend line without a standard error ribbon.