Similar deal to your hyperbola question you made previously.
[tex]\frac{-3x^2+1}{x^2}=\frac{-3x^2}{x^2}+\frac{1}{x^2}=-3+\frac{1}{x^2}[/tex]
so now you should be able to sketch the graph using already known graphs such as [itex]y=\frac{1}{x^2}[/itex]