Problem-Solving and Data AnalysisEasy–MediumMeaning of the slope in a study-time model
Problem-Solving and Data Analysis practice question
A model based on a scatterplot predicts a student's test score s from the number of hours h spent studying: s = 12h + 20. What does the number 12 represent?
- A. The predicted increase in score for each additional hour of studyCorrect
- B. The predicted score of a student who does not study
- C. The number of hours needed to reach a score of 20
- D. The highest score the model predicts
Answer: A. The predicted increase in score for each additional hour of study
12 is the slope: score per hour.
Why the other answers are wrong
- B. The predicted score of a student who does not study
- That is 20, the intercept.
- C. The number of hours needed to reach a score of 20
- A score of 20 is predicted at 0 hours.
- D. The highest score the model predicts
- The model has no maximum.
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