y y\,y is inversely proportional to x x\,x
When y=5y = 5y=5, x=12x = 12x=12
Find the value of x x\,x when y=15y = 15y=15
164 exam-style questions on OCR GCSE Maths Direct and Inverse Proportion. Each one has a worked solution and a mark scheme showing where the marks go.