AlgebraEasy–MediumRate from two points in context
Algebra practice question
A hiker was at an altitude of 700 metres at 2 p.m. and 1,300 metres at 5 p.m. If the altitude increased at a constant rate, by how many metres did it rise per hour?
Answer: 200
Rise of 600 metres over 3 hours: 600 ÷ 3 = 200 metres per hour.
Common wrong answers
- If you answered 100
- 100 divides 600 by 6 (misreading the time interval).
- If you answered 433
- 433 divides 1300 by 3, ignoring the starting altitude.
- If you answered 600
- 600 is the total rise, not the rate.
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