GCSE & iGCSE Scatter Graphs worksheet

Scatter graph worksheet for GCSE and iGCSE maths: correlation, outliers, line of best fit, reliability of estimates and correlation versus causation.

A complete scatter graphs worksheet for Pearson Edexcel GCSE (1MA1) and International GCSE (4MA1), written so one resource works for both tiers. Every section is clearly labelled Foundation or Higher, and questions get harder as you go.

What’s covered — Foundation

Plotting points and describing correlation
Spotting outliers
Drawing a line of best fit and using it to estimate
Knowing when an estimate is reliable, and that correlation does not prove causation

What’s covered — Higher (grades 6 to 9)

The equation of a line of best fit
Interpreting its gradient in context
The mean point

How it’s structured

A. Worked examples & Your turn — a model solution beside a matching question to try
B. Fluency — core skills
C. Reasoning — explain it
D. Problem solving — unfamiliar, multi-step questions
E. Exam practice — exam-style questions with mark allocations

123 marks across Sections B to E (61 Foundation, 62 Higher), with a progress tracker on the front page so students can record their score per section. Interpolation versus extrapolation is asked for explicitly, since “why might this estimate be unreliable?” is a guaranteed mark on this topic.

How to use it

Works as a full lesson, homework, a cover lesson or targeted intervention. Because each tier is labelled, you can set the Foundation sections to one group and the Higher sections to another from the same print.

What’s included

14-page worksheet (PDF, printable, with answer spaces)
6-page full worked solutions (PDF) — complete method for every question, not just final answers
Calculator allowed

Specification

Pearson Edexcel GCSE Mathematics (1MA1) and International GCSE Mathematics (4MA1), Statistics. All questions are original.