Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Recognise Correlation and Causation

In this worksheet, students will practise recognising correlation and causation in scatter graphs.

'Recognise Correlation and Causation' worksheet

Key stage:  KS 4

Year:  GCSE

GCSE Subjects:   Maths

GCSE Boards:   AQA, Eduqas, Pearson Edexcel, OCR,

Curriculum topic:   Statistics

Curriculum subtopic:   Statistics Analysing Data

Difficulty level:  

Worksheet Overview

When you have drawn a scatter graph, you need to be able to both state and interpret the correlation.


What is correlation?

Correlation is the connection between two variables eg. height and weight.


It is used do two things:

Say if there is a connection between two variables.

Describe how one variable affects the other.


What do the correlations look like?

There are three types of correlation:


Positive correlation


a positive correlation


In positive correlation, the pattern goes from the bottom left to the top right.

This means that as one variable gets bigger, the other gets bigger as well.



Negative correlation


negative correlation


In negative correlation, the pattern goes from the top left to the bottom right.

This means that as one variable gets bigger, the other gets smaller.



 No correlation


no correlation


When the points are scattered all over the graph, there isn't a pattern that links the two, so we say there is no correlation.


What is causation?

Causation is a bit trickier to get your head round - sometimes you just have to use common sense.

If you plotted a graph of height against weight, you would get a positive correlation. This is also causation because the two are linked - it makes sense to say that the taller you are, the more you weigh.


If however, you plotted the number of pirates in the world against the average global temperature, you would get a negative correlation. Does this mean that the more pirates there are in the world, the lower the temperature? Does it make sense that the two are linked?

This is an example of the fact that correlation does not imply causation.


Just because you have two things that appear to be linked, it doesn't always mean that one causes the other.


Time for some questions now.

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started

Try an activity or get started for free