variation... urgent

y increased by 25%

2007-04-28 21:35:03 補充：
Suppose y varies inversely as (sqrt x)then y*x^(1/2)=constantif x decresased by 36%, then x becomes 0.64xthen LHS of equation changed toy*(0.64x)^(1/2)y*0.8(x)^(1/2)since LHS is a constant, then y has to be value changed to y*(1/0.8), i.e. 1.25therefore, y is increased by 25%