GCSE · Scatter graphs & correlation

Scatter graphs & correlationExam-style questions

Why one point on a scatter graph is one individual measured twice, how to describe correlation by type and strength in the words of the question, why a correlation never proves a cause, and how to place a line of best fit — through the bulk of the data, balanced either side, ignoring a genuine outlier.

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10 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAllLevel 1Level 2Level 3Level 4Level 5
  1. 1
    The scatter graph shows the hours students revised and their test scores.24681020304050607080Hours revisedTest scoreDescribe the type of correlation shown.
    Level 1 · 1 markTry it
  2. 2
    A scatter graph of the age of a car against its value shows that as age increases, value decreases. What type of correlation is this?
    Level 1 · 1 markTry it