An influential point is a data point that has a significant impact on the results of a regression model. It can dramatically affect the slope and position of the line of best fit.
Related terms
Outlier: A data point that lies far away from other points in a scatter plot.
Leverage: The ability of an individual data point to influence the slope of the regression line.
Residual: The difference between the observed value and the predicted value for a specific data point in a regression model.