Question 41626
A variable z varies jointly with x and the square of y. If z = 6 when x = 4 and y = 3, write the equation of joint variation.
Z=K*X*Y^2
Z=6...X=4...Y=3..HENCE
6=K*4*3^2=36K
K=6/36=1/6
HENCE 
Z=(X*Y^2)/6