What is the slant asymptote of f(x)=x3+1x2−4f(x) = \frac{x^3+1}{x^2-4}f(x)=x2−4x3+1?
y=xy=xy=x
y=x+2y=x+2y=x+2
y=x−4y=x-4y=x−4
y=x+1y=x+1y=x+1