intensity of waves

1. The problem statement, all variables and given/known data



since we know that the intensity of wave is I=P/A P =power, A=area



so I = 0.5m(w^2)(y^2)/4pi (x^2 )





so i got I is directly propotional to (y^2)/ (x^2 )



but there's variable x in the eqaution of y...



so can i say that I is directly propotional to y^2 / x^4 as in the third photo?



p/s : in here y also represnt A .



hopefully you guys can understand .



2. Relevant equations







3. The attempt at a solution

Attached Images

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	IMG_20140713_085828[1].jpg (48.6 KB)