Scientists in Brazil investigated the relationship between rainfall and the number of malaria cases. The data showed that years with high rainfall had high malaria cases, and years with low rainfall had low malaria cases. What type of relationship does this describe?

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Question

Scientists in Brazil investigated the relationship between rainfall and the number of malaria cases. The data showed that years with high rainfall had high malaria cases, and years with low rainfall had low malaria cases. What type of relationship does this describe?

Accepted Answer

positive correlation — Award 1 mark for correct answer. A positive correlation occurs when both variables increase together or both decrease together. A is incorrect — negative correlation occurs when one variable increases as the other decreases. C is incorrect — there is clearly a relationship described. D is incorrect — inverse proportion is a specific mathematical relationship, not demonstrated here.

Answer

inverse proportion

Answer

no correlation

Answer

positive correlation

Answer

negative correlation

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