- Domain in interval notation: \((- \infty, \frac{1}{2}) \cup (\frac{1}{2}, \infty)\)
- Equation of the slant asymptote: \( y = 4x + 1 \)
\[
\boxed{\text{Domain: } (-\infty, \frac{1}{2}) \cup (\frac{1}{2}, \infty)}
\]
\[
\boxed{\text{Slant Asymptote: } y = 4x + 1}
\]