Linear Regression in Python: Explained with coding examples

Before I go to the implementation of Linear Regression in Python, we'll take a minute to understand what Linear Regression is. Linear Regression is a linear line that predicts the relationship of a dependent variable to an independent variable. From the above simple definition, you might be confused as to how the line predicts this relationship? Suppose we have the per capita income of the US by year, as shown in Figure 1 below. In the figure, each year has a corresponding income with it.