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Mathematics Worksheet
🔗 Correlation
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Interpret the correlation coefficient r.Distinguish strong from weak correlation.Know that r ranges from −1 to 1.Understand that correlation is not causation.📚 Quick Recap
Correlation measures the strength and direction of a linear relationship between two variables — how closely they move together.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1r = 0.99 is:
2r = −0.99 is:
3r = 0.3 is:
4Ice-cream sales and drownings both rise with heat. Does one cause the other?
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5Correlation r ranges from −1 to .
6r = +1 is a perfect linear relationship.
7Is r = 0.99 a strong or weak correlation?
8Is r = −0.99 a strong or weak correlation?
9Is r = 0.3 a strong or weak correlation?
🚀 Section C · Challenge ● CHALLENGE 5
10Ice-cream sales and drownings both correlate with hot weather. Does one cause the other?
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/11 C ___/5 Total ___/20
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✂ answer key — fold or cut before handing out
1-A 2-A 3-A 4-B | 5 1 6 positive 7 = Very strong (positive) 8 = Very strong (negative) 9 = Weak to moderate | 10 = No, both are linked to a third factor