When we use regression line to predict a point whose x-value is outside the range of x-values of training data, it is called extrapolation. In order to (deliberately) extrapolate we just use the regression line to predict values that are far from training data.

Can linear regression extrapolate?

The linear regression is also (outside the x-coordinate range) an instance of extrapolation. The same line regresses four set of points, with the same standard statistics.

Can regression be used for extrapolation?

Making Predictions Using Regression Inference

Regression models predict a value of the Y variable, given known values of the X variables. ... Prediction outside this range of the data is known as extrapolation. Performing extrapolation relies strongly on the regression assumptions.