Question 14
A teacher recorded the revision time and test scores of 10 students. The scatter graph shows this information.
| Revision hours | Test score (%) |
|---|---|
| 2 | 20 |
| 5 | 32 |
| 8 | 40 |
| 10 | 45 |
| 12 | 60 |
| 15 | 55 |
| 18 | 72 |
| 20 | 85 |
| 22 | 78 |
| 25 | 95 |
a.[1]
What type of correlation does the scatter graph show?
b.[2]
A student revised for 14 hours. Estimate the test score for this student.
c.[1]
The teacher wants to use the scatter graph to predict the test score for a student who revised for 50 hours. Comment on the reliability of this prediction.
Scatter Graphs Questions
55 exam-style questions on AQA GCSE Maths Scatter Graphs. Each one has a worked solution and a mark scheme showing where the marks go.