IB skill practice

Judge extrapolation from regression models

Decide whether a prediction lies inside or outside the data domain.

Paper 1, Paper 2 5 marks Difficulty 4

Judge extrapolation from regression models - graph-supported reasoning

A university admissions sample regression was fitted using data with \(x\)-values from 2 to 23. A prediction is requested at \(x=26\). Enter 1 if this is interpolation, otherwise 0. Confirm the interpretation before entering the result. Enter the requested value and choose the interpretation that matches the result.

Worked practice: result and interpretation

Calculate the requested result first, then choose the interpretation that follows from it.