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Lines of best fit
Fit a line to bivariate data by eye, find its equation, make predictions and recognise the dangers of extrapolation and assuming causation.
⏱ 20 min❓ 10 questions
What you'll be able to do
- ✔I can draw a line of best fit by eye and find its equation from two points on the line
- ✔I can use the line to make predictions and decide whether they are interpolation or extrapolation
- ✔I can explain why a strong association does not prove that one variable causes the other
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
- 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
10 questions and 1 quick teaching card, including:
- 🔢Number answer — Work out the answer and type the number.
👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.
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Curriculum: AC9M10ST03