Evaluate the limit $$\lim_{ x \rightarrow \infty } \frac {4 x^3 - 7 x^2 -3 x }{ 9 - 11 x - 7 x^3 }$$
Thus $$y = \frac {4 x^3 - 7 x^2 -3 x }{ 9 - 11 x - 7 x^3 }$$ has a horizontal asymptote
$y =$
(Type in DNE if there is no horizontal asymptote.)