Overfitted Data.png
From WikiRecord, the encyclopedia of everything · Media · data from Wikimedia Commons
Somewhat noisy linear data fit to both a linear function and to a polynomial of 10 degrees. Although the polynomial function is a perfect fit, the linear version can be expected to generalize better. In other words, if the two functions were used to extrapolate beyond the fit data, the linear function would make better predictions.
Source: Own work