Problem-Solving and Data AnalysisEasy–MediumPair of variables with a negative association
Problem-Solving and Data Analysis practice question
The line of best fit for a scatterplot has a NEGATIVE slope. Which of the following pairs of variables is most likely to be the ones plotted?
- A. Average outdoor temperature and the amount of heating fuel a household uses.Correct
- B. A person's height and weight.
- C. Hours spent studying and score on a test.
- D. The price of a product and the cost of the raw materials in it.
Answer: A. Average outdoor temperature and the amount of heating fuel a household uses.
When the temperature is higher, households burn less heating fuel: as one variable rises, the other falls — a negative association.
Why the other answers are wrong
- B. A person's height and weight.
- Taller people tend to weigh more: positive.
- C. Hours spent studying and score on a test.
- More study, higher scores: positive.
- D. The price of a product and the cost of the raw materials in it.
- Costlier materials, higher prices: positive.
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