what does r squared tell you 
r squared tells you the proportion of the variance in the dependent variable that is explained by the independent variable s in a regression model it measures the goodness of fit of the model to the observed data indicating how well the model s predictions match the actual data points can r squared be negative no r squared cannot be negative it always falls within the range of 0 to 1 where 0 indicates that the independent variable s do not explain any of the variability in the dependent variable and 1 indicates a perfect fit of the model to the data 