Case study·Hard exam skill (4/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
During a practical viva, an examiner gives a student a graph with scattered data points and asks how to report the slope from the graph.
Total: 5 marks
(a) Should the student force the line through every point? Explain. (2 marks)
(b) Why should two nearby raw points not be used for the final slope? (1 mark)
(c) How should the final slope be chosen from scattered data? (2 marks)
Something wrong with this item?