Question: Reflect each figure across the given reflection line.
a. Reflect the given figure across the $x$-axis.
b. Reflect the given figure across the line $x = -3$.
c. Reflect the given figure across the line $y = 1$.
d. Reflect the given figure across the line $y = x$.
1. **Problem Statement:** Reflect each given figure across the specified reflection line.
2. **Reflection Rules:**
- Reflection across the $x$-axis: $(x,y) \to (x,-y)$.
- Reflection across the vertical line $x = a$: $(x,y) \to (2a - x, y)$.
- Reflection across the horizontal line $y = b$: $(x,y) \to (x, 2b - y)$.
- Reflection across the line $y = x$: $(x,y) \to (y,x)$.
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### a. Reflect across the $x$-axis
- Each point $(x,y)$ of the figure becomes $(x,-y)$.
- This flips the figure vertically, moving it from the bottom-right quadrant to the top-right quadrant.
### b. Reflect across the line $x = -3$
- Each point $(x,y)$ becomes $(2(-3) - x, y) = (-6 - x, y)$.
- This moves the figure symmetrically to the left side of the line $x = -3$.
### c. Reflect across the line $y = 1$
- Each point $(x,y)$ becomes $(x, 2(1) - y) = (x, 2 - y)$.
- This flips the figure vertically about the line $y=1$, moving it below that line.
### d. Reflect across the line $y = x$
- Each point $(x,y)$ becomes $(y,x)$.
- This swaps the $x$ and $y$ coordinates, reflecting the figure across the diagonal line.
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**Summary:**
- Use the formulas above to find the reflected coordinates of each vertex.
- Plotting these new points will give the reflected figure.
This completes the reflection transformations for all four parts.