DOC added description for RANSAC algorithm
Robust linear model estimation using RANSAC
===========================================
-In this example we see how to robustly fit a linear model to faulty data using
-the RANSAC algorithm.
+In this example, we see how to robustly fit a linear model to faulty data using
+the :ref:`RANSAC <ransac_regression>` algorithm.
+
+The ordinary linear regressor is sensitive to outliers, and the fitted line can
+easily be skewed away from the true underlying relationship of data.
+
+The RANSAC regressor automatically splits the data into inliers and outliers,
+and the fitted line is determined only by the identified inliers.
+
"""
