Practice Direct Proportion (11.2) - Direct and Inverse Proportions

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8 questions

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6 sample questions

Question 1.
If the cost of 2 kg of sugar is

72, how much would 5 kg cost?
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Think about the ratio.
Question 2.
If 4 litres of petrol cost 60, what would 16 litres cost?
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Multiply the cost of 4 litres by 4.
3Question 3.
If two quantities are said to be in direct proportion, what does that mean?
- They change independently
- They change together in a consistent ratio
- They do not affect each other
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Think about how one quantity affects another.
4Question 4.
Is it true that if two variables maintain constant ratios, they are in direct proportion?
- True
- False
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Recall how ratios work.
Question 5.
A photograph of a bacteria is enlarged 50,000 times, having a length of 5 cm. What is the actual length of the bacteria, and if enlarged only 20,000 times, what would be its length?
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Think about how enlargement affects size.
Question 6.
Two cities are 4 cm apart on a map with a scale of 1:30000000. What is the actual distance?
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Use the scale ratio to calculate actual distances.

4 more questions in this section. Enroll free to practise them all.