Well, in the numerator, it's the 3x to the 3rd term. In the denominator, it's the 6x to the 4th term. So this is going to be the same thing as the limit of 3x to the 3rd over 6x to the 4th as x approaches negative infinity. And if we simplify this, this is going to be equal to the limit as x approaches negative infinity of 1 over 2x. And what's this going to be? Well, if the denominator, even though it's becoming a larger and larger and larger negative number, it becomes 1 over a very, very large negative number, which is going to get us pretty darn close to 0, just as 1 over x as x approaches negative infinity gets us close to 0. So this right over here, the horizontal asymptote in this case is y is equal to 0.