“Insulin has inelastic demand because: (1) it is a life-saving necessity, so consumers cannot easily reduce usage; (2) there are few close substitutes; (3) for most diabetics, insulin costs are a small proportion of income, so price changes have little effect on quantity demanded.”
For any answer you check, verbally explain why that answer is correct. If you can’t, you haven’t learned. Pitfall 3: Focusing Only on Correct/Incorrect Why it’s bad: A “correct” short answer might still be weak in exam conditions if it lacks sufficient detail or economic terminology. Cambridge Igcse Economics Workbook Answers Susan Grant
Compare your answer to a mark scheme (from past papers) to see how many marks it would earn. A 2-mark “explain” question needs two clear reasons. Building an Effective Study Routine with Susan Grant’s Workbook Here is a weekly study plan that maximises the workbook without relying on illicit answers: “Insulin has inelastic demand because: (1) it is
“Because people need insulin to live, so they will buy it even if price increases.” Compare your answer to a mark scheme (from
So, by all means, search for “Cambridge IGCSE Economics Workbook Answers Susan Grant”—but use this article as a guide to find the right kind of help: not a list of final answers, but the methods, resources, and study habits that produce correct answers independently.
Look up “determinants of PED.” You find: necessities have inelastic demand; lack of substitutes; low proportion of income. Your answer mentioned necessity, but not substitutes or income proportion.
