Solve the differential equation $\displaystyle \frac{dy}{dx} = \frac{x}{9 y}$.

1. Find an implicit solution and put your answer in the following form:
   = constant.   (Help: formulas.)
   
   
2. Find the equation of the solution through the point $(x,y) = (3,1)$. Your equation must describe a single curve $y=f(x)$ with the domain of $f$ as large as possible.  (Help: equations.)
   
   
   
3. Find the equation of the solution through the point $(x,y) = (0,-6)$. Your answer should be of the form $y = f(x)$.  (Help: equations.)