alleryStart learning →Ratio constant, or product constant?
Exercise and reference answers
- Items
- Item
- x ÷ y stays constant
- Category
- Direct proportion
- Item
- Both rise together
- Category
- Direct proportion
- Item
- x₁/y₁ = x₂/y₂
- Category
- Direct proportion
- Item
- x × y stays constant
- Category
- Inverse proportion
- Item
- One rises as the other falls
- Category
- Inverse proportion
- Item
- x₁y₁ = x₂y₂
- Category
- Inverse proportion
- Categories
- Item
- Direct proportion
- Item
- Inverse proportion
Explanation
One line separates the two kinds of variation, and every question in the topic turns on it. Source: syllabus Maths, Ch 11 Direct and Inverse Proportions.