Choosing a proportion model
Choosing a proportion model
Secondary 2
The table shows three relationships, A, B and C, between \(x\) and \(y\).
| \(x\) | \(2\) | \(4\) | \(10\) |
|---|---|---|---|
| \(y\) in A | \(5\) | \(10\) | \(25\) |
| \(y\) in B | \(15\) | \(7.5\) | \(3\) |
| \(y\) in C | \(7\) | \(11\) | \(23\) |
- For each relationship, state whether \(y\) is directly proportional to \(x\), inversely proportional to \(x\), or neither. Justify each answer.
- Write down the equation connecting \(x\) and \(y\) for each proportional relationship.
Solution:
Solution locked
680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs a course plan.
Create a free account to practise similar questions.
Answer:(a) A: direct; B: inverse; C: neither
(b) A: \(y=2.5x\); B: \(y=\dfrac{30}{x}\)
Need help? Join our E-Maths tuition for O-Level success.
Learn more