1. **State the problem:** We are given the rational function $f(x) = \frac{5}{x - 4}$ and need to analyze its domain, vertical and horizontal asymptotes.
2. **Domain:** The function is undefined where the denominator is zero. Set $x - 4 = 0$ which gives $x = 4$. So, the domain is all real numbers except $x = 4$.
3. **Vertical asymptote:** Vertical asymptotes occur where the denominator is zero and the numerator is nonzero. Here, at $x = 4$, the denominator is zero and numerator is 5, so there is a vertical asymptote at $x = 4$.
4. **Horizontal asymptote:** For rational functions where the degree of numerator is less than the degree of denominator, the horizontal asymptote is $y = 0$. Here, numerator degree is 0 and denominator degree is 1, so horizontal asymptote is $y = 0$.
5. **Summary:**
- Domain: all real numbers except $x = 4$
- Vertical asymptote: $x = 4$
- Horizontal asymptote: $y = 0$
6. **Graph shape:** The graph approaches the vertical line $x=4$ but never touches it, and as $x$ goes to $\pm \infty$, $f(x)$ approaches 0.
**Final answer:**
- Domain: $x \neq 4$
- Vertical asymptote: $x = 4$
- Horizontal asymptote: $y = 0$
Rational Function Dfd309
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