GCSE · Scatter graphs & correlation

Predicting from a line of best fitExam-style questions

How to read an estimate off a line of best fit in both directions, why a prediction inside the data is trustworthy and one outside it is not, and what the gradient of the line means in the context of the question.

Start practising Read the lesson

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

DifficultyAll Level 1 Level 2 Level 3 Level 4 Level 5

1
On 14 days a beach café recorded the number of hours of sunshine and the number of customers it served. The scatter graph shows the results, with a line of best fit drawn.(a) Use the line of best fit to estimate the number of customers on a day with $3$ hours of sunshine.

(b) On another day the café served $150$ customers. Use the line of best fit to estimate the number of hours of sunshine on that day.
Level 2 · 4 marksTry it