x x\,x is inversely proportional to the square root of y y\,y
When x=12x = 12x=12, y=9y = 9y=9
Find the value of x x\,x when y=81y = 81y=81
Practise Edexcel GCSE Maths Direct and Inverse Proportion with exam-style questions for Foundation and Higher tier. 96 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.