Mathematics for IGCSE & O level - Proportion (Section 2 - No. 38)

What are the key points from the key points section of the image?

The symbol ∝ means "is proportional to"

y = ax^2 is for direct proportion.

y = k/x represents inverse proportion

For inverse proportion, you can use the fraction version y=k/x.

Correct. The key points are a summary of proportion concepts, and these choices correctly summarize the info.