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Which stays fixed in the situation?

Exercise and reference answers

Items
  1. Item
    Workers against days
    Category
    The job is fixed
  2. Item
    Taps against filling time
    Category
    The job is fixed
  3. Item
    Speed against travel time
    Category
    The route is fixed
  4. Item
    Faster car, shorter trip
    Category
    The route is fixed
  5. Item
    Kilograms against total cost
    Category
    The unit price is fixed
  6. Item
    Items against amount paid
    Category
    The unit price is fixed
Categories
  1. Item
    The job is fixed
  2. Item
    The route is fixed
  3. Item
    The unit price is fixed

Explanation

Naming the fixed quantity tells you which proportion applies. Source: syllabus Maths, Ch 11 Direct and Inverse Proportions.
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