IB Maths correlation and regression lesson

Pearson’s r, the regression line by hand and on the GDC, interpolation and extrapolation, and why correlation is not causation. Written for IB Diploma Topic 4, common to AA and AI at SL and HL.

What is in the PDF

• The student lesson: a warm-up, the regression line worked by hand, GDC steps for TI-Nspire and Casio, a second example the student finishes, and an original exam-style question with steps leading up to it.
• The teacher page: full answers and a markscheme for the exam-style question, what each common wrong answer tells you about a student’s thinking, and questions at three levels for the board.

Use it live with a class, free and with no login. Students drag one point and watch r fall from 0.989 to almost nothing:
https://ksmaths.com/topic-4/correlation/

This is one of 97 free sample lessons from ksmaths.com, a course of 423 interactive lessons from MYP Year 7 to the IB Diploma (AA and AI, SL and HL). The full course starts at $59. Teacher pages are $49 a teacher for twelve months, and a school licence is $349: https://ksmaths.com/schools/

Written by Keith Spencer, Head of Mathematics, thirty years teaching IB, US and UK curricula. Original material, not produced or endorsed by the IB.