There are lots of resources around for this topic at Higher but they usually start with deriving the formulae, which isn’t required at Foundation. I’ve therefore put this handout together to cover just what a Foundation student needs to know:
- forms of equation for direct and inverse proportion
- shapes of graph
- examples
- using the graphs and formulae to find values
It doesn’t include squares or roots, but if you’ve seen Foundation questions that do use those forms of equation then please let me know and I’ll add them.
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Thank you! Very hard to find Foundation questions. The site Mathsgenie under GCSE revision > grade 5 > Direct and inverse proportion have some substitution style questions with squares (questions 9-12)
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