For full marks, always draw with a sharp pencil, label every axis and curve clearly, and shade key areas precisely. But beta, I must say, the real trick is to explain the diagram’s story in your own words—examiners cherish that understanding over mere neatness. I learned this watching my daughter debate; her clarity on that cracked screen matters more than any perfect prop. So practice explaining each line as if teaching a customer, not just drawing for the examiner.
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