1. **State the problem:**
We need to identify the graphs of the functions
$$g(x) = \frac{3x}{x^2 - 2x - 8}$$
and
$$h(x) = \frac{x^2 + 1}{x^2 + 2x - 3}$$
from the given graph options.
2. **Find vertical asymptotes:**
Vertical asymptotes occur where the denominator is zero (and numerator is not zero).
For $g(x)$:
$$x^2 - 2x - 8 = 0$$
Factor:
$$x^2 - 2x - 8 = (x - 4)(x + 2) = 0$$
So vertical asymptotes at $x = 4$ and $x = -2$.
For $h(x)$:
$$x^2 + 2x - 3 = 0$$
Factor:
$$x^2 + 2x - 3 = (x + 3)(x - 1) = 0$$
So vertical asymptotes at $x = -3$ and $x = 1$.
3. **Match vertical asymptotes to graphs:**
- Graphs with vertical asymptotes at $x = -2$ and $x = 4$ are Graph A and Graph D.
- Graphs with vertical asymptotes at $x = -3$ and $x = 1$ are Graph C, Graph E, and Graph F.
4. **Analyze behavior of $g(x)$:**
- Numerator is $3x$, zero at $x=0$.
- Denominator zeros at $-2$ and $4$.
- For large $x$, $g(x) \approx \frac{3x}{x^2} = \frac{3}{x} \to 0$.
- Check sign near asymptotes:
- For $x < -2$, denominator $(x-4)(x+2)$: both negative, product positive, numerator negative, so $g(x)$ negative.
- Between $-2$ and $4$, denominator negative, numerator varies.
- Graph A and D have vertical asymptotes at $-2$ and $4$.
- Graph A has a maximum near $y=5$ and negative branch on right.
- Graph D has positive branch going up on left and negative branch on right.
5. **Analyze behavior of $h(x)$:**
- Numerator $x^2 + 1$ always positive.
- Denominator zeros at $-3$ and $1$.
- For large $x$, $h(x) \approx \frac{x^2}{x^2} = 1$.
- Vertical asymptotes at $-3$ and $1$.
- Graph C, E, F have these asymptotes.
- Graph C has branches in first and second quadrants bending toward asymptotes.
- Graph E is similar but rotated.
- Graph F has branches in first and third quadrants.
6. **Conclusion:**
- $g(x)$ matches Graph A or D; since Graph A has a maximum near $y=5$ and negative branch on right, which fits $g(x)$ behavior, choose Graph A.
- $h(x)$ matches Graph C best due to asymptotes and branch locations.
**Final answers:**
(a) Graph A is the graph of $g(x)$.
(b) Graph C is the graph of $h(x)$.
Graph Identification B28685
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