Mathematics — first biennium · Lesson
In direct proportion y/x stays constant; in inverse proportion the product x·y stays constant.
In this lesson: Distinguish direct and inverse proportionality and determine the constant k from data.
How to proceed: Run the same check on at least two rows: if y/x stays equal you have direct proportion; if x·y stays equal you have inverse proportion.
You can already assume: Ratios and function representations.
Completed exercises: 0/5 · Correct on first attempt: 0
Run the same check on at least two rows: if y/x stays equal you have direct proportion; if x·y stays equal you have inverse proportion.
Given data: x=2, y=5; x=4, y=10; x=6, y=15
| x | y |
|---|---|
| 2 | 5 |
| 4 | 10 |
| 6 | 15 |
ConceptStep separates what is required from what is recommended or useful as reinforcement. Only required prerequisites block your progress.
Relationships: solid line = required · dashed line = recommended · dotted line = reinforcement.