Chapter 4 - 4.1 - Rational Functions and Asymptotes - 4.1 Exercises - Page 315: 18

Vertical asymptote: $x=-1$ There is no horizontal asymptote.

For the vertical asymptote, the denominator must be equal to $0$: $x+1=0$ $x=-1$ The degree of the numerator is greater than the degree of the denominator. So, there is no horizontal asymptote.