Butter and buttermilk are goods in joint supply. Supply curves in both markets slope upwards to the right. Health concerns cause people to reduce their consumption of butter. What are the initial consequences of this for supply in the markets for butter and buttermilk?
✓ Correct Answer
The correct answer is B: shift left of the supply curve, shift left of the supply curve
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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