Problem-Solving and Data AnalysisEasy–MediumInterpreting a downward trend
Problem-Solving and Data Analysis practice question
A scatterplot shows the age of used cars on the x-axis and their selling prices on the y-axis. The points trend downward from left to right. Which of the following does this suggest?
- A. Older cars tend to sell for less.Correct
- B. Older cars tend to sell for more.
- C. Age has no relationship with price.
- D. Every car of the same age sells for the same price.
Answer: A. Older cars tend to sell for less.
As x (age) increases, y (price) tends to fall: a negative association.
Why the other answers are wrong
- B. Older cars tend to sell for more.
- That would trend upward.
- C. Age has no relationship with price.
- A clear trend is a relationship.
- D. Every car of the same age sells for the same price.
- A trend does not mean identical prices.
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