Mathematics for IGCSE & O level - Ratio And Proportion (Section 5 - No. 19)
Which of the following scenarios represents direct proportion?
The number of workers and the time to complete a job.
The speed of a car and the time to travel a fixed distance.
The amount of money earned and the number of hours worked at a constant hourly rate.
The amount of water in a tank and the time taken to drain the tank.
Explanation
Direct proportion: As one quantity increases, the other increases proportionally.
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