R Instructions: Linear Regression

In order to fit the regression line, we use the command lm(). The lm() command produces a large amount of information, which we will want to extract as we need it, so we save the information to another variable name model.

model = lm(olym$Time~olym$Year)

To add the regression line to the scatterplot, we can extract the linear equation from model and add the line to the scatterplot.

We can also extract the y-intercept and slope from the model to determine the regression equation:

coef(model)