1. **Problem statement:** Given the graph of the function $y = \frac{1}{f(x)}$ with vertical asymptote at $x = -2$, horizontal asymptote at $y = 0$, and points $(-3, -0.5)$ and $(-1, 0.5)$, we need to sketch the graph of $y = f(x)$ and find the equation for $f(x)$.
2. **Understanding the problem:** The function $y = \frac{1}{f(x)}$ has a vertical asymptote at $x = -2$, which means $f(-2) = 0$ because division by zero causes the vertical asymptote.
3. The horizontal asymptote $y = 0$ for $y = \frac{1}{f(x)}$ means that as $x \to \pm \infty$, $\frac{1}{f(x)} \to 0$, so $f(x) \to \pm \infty$.
4. Using the points given for $y = \frac{1}{f(x)}$:
- At $x = -3$, $y = -0.5 = \frac{1}{f(-3)} \Rightarrow f(-3) = \frac{1}{-0.5} = -2$
- At $x = -1$, $y = 0.5 = \frac{1}{f(-1)} \Rightarrow f(-1) = \frac{1}{0.5} = 2$
5. **Summary of $f(x)$ values:**
- $f(-2) = 0$ (vertical asymptote of $y=1/f(x)$)
- $f(-3) = -2$
- $f(-1) = 2$
6. **Form of $f(x)$:** Since $f(x)$ has a zero at $x = -2$, it can be written as $f(x) = a(x + 2)$ for some constant $a$.
7. Use the point $(-1, 2)$ to find $a$:
$$2 = a(-1 + 2) = a(1) \Rightarrow a = 2$$
8. So, $f(x) = 2(x + 2)$.
9. **Check with $x = -3$:**
$$f(-3) = 2(-3 + 2) = 2(-1) = -2$$ which matches the value found.
10. **Sketching $y = f(x)$:**
- It is a straight line crossing the x-axis at $x = -2$.
- Passes through $(-3, -2)$ and $(-1, 2)$.
**Final answers:**
- The graph of $y = f(x)$ is a line with equation $$f(x) = 2(x + 2)$$
- The sketch is a line crossing the x-axis at $-2$ and points $(-3, -2)$ and $(-1, 2)$.
Inverse Function 3D6C01
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