y y\,y is inversely proportional to the cube of x x\,x
When y=250,x=0.2y = 250, x = 0.2y=250,x=0.2
Find the value of y y\,y when x=0.5x = 0.5x=0.5
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.