A Beginner's Guide to EDA with Linear Regression -- Part 3

Mother Race -- but what we are seeing at X-Axis here is a bunch of variables. When you look closer you would notice that each variable seems to be representing each unique value of Mother Race variable. Linear Regression function'lm' in R automatically transforms a categorical variable into something called'dummy' variables. It will create a column for each categorical value (e.g. Japanese) and have a value of 0 or 1 based on whether a given row matches a given column (e.g.