Direct and Inverse Proportion: Understanding How Quantities Change Together
If 3 cinema tickets cost £18, would 6 tickets cost £36? If 4 people take 6 hours to complete a job, would 8 people necessarily take 12 hours? The first situation may show direct proportion, but the second does not follow the same pattern. The key question is whether the quantities change by a common multiplier, rather than merely changing in the same direction.
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