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Order the reasoning: decide which proportion applies

Exercise and reference answers

Steps
  1. Name the two quantities that vary
  2. Ask what happens to the second when the first increases
  3. If it also increases, the proportion is direct
  4. If it decreases, the proportion is inverse
  5. Write the matching equation and solve

Explanation

Type first, equation second, arithmetic last. Source: syllabus Maths, Ch 11 Direct and Inverse Proportions.
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