The variables y y\,y and x x\,x are such that y y\,y is inversely proportional to x2x^2x2.
When x=3x = 3x=3, y=2y = 2y=2.
Find an equation for y y\,y in terms of xxx.
Sketch the graph of y y\,y against x x\,x for x>0x > 0x>0, stating the equations of the asymptotes.