Graph Slope
Best-fit straight line slope estimation reduces random error by using:
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About This Question
- Subject
- physics
- Chapter
- experimental skills and error analysis
- Topic
- graph slope
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
All data points via regression
Linear regression (Method of Least Squares) calculates the line that minimizes the sum of the squares of the vertical offsets of all points.
- Using all points compensates for individual random fluctuations in single readings.
- It provides more reliable values for slope and intercept than simply joining the first and last points.
This hard difficulty physics question is from the chapter experimental skills and error analysis, covering the topic of graph slope. It appeared in the 2025 exam.
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