x x\,x is inversely proportional to the square root of y y\,y
When x=12,y=9x = 12, y = 9x=12,y=9
Find the value of x x\,x when y=81y = 81y=81
Practise Edexcel IGCSE Maths Direct and Inverse Proportion with exam-style questions for IGCSE Maths. 22 questions, matched to the Edexcel IGCSE Maths (4MA1) specification and written in Paper 1 and Paper 2 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.