What is the equation of the slant asymptote for R(x) = x^2 - x + 17 divided by x^2 + 1?
Did you divide them yet?
The slant asymptote for $\displaystyle \frac{f(x)}{g(x)}$
Is after you divide them through polynomial long divison you should get
$\displaystyle f(x)+\frac{r(x)}{g(x)}$
where $\displaystyle r(x)$ is the remainder. And your slant asymptote is $\displaystyle r(x)$.
So polynomial long divide them and then report back.