1. Point P is 7 units below the $x$-axis. After a reflection across the $x$-axis, its image, P', is ___ units above the $x$-axis.
2. Point B is located 5 units to the right of the $y$-axis. Where is the reflection of point B across the $y$-axis?
3. Point $M$ at $(-4, 8)$ is reflected to point $M'$ at $(4, 8)$. The line of reflection is the ___-axis.
4. Which statement best describes the relationship between a point and its reflection across a line?
5. A point is 10 units above the $x$-axis. Its reflection across the $x$-axis is located 10 units ___ the $x$-axis.
6. If point $D$ is reflected across the x-axis, its image is labeled as ___.
7. In a reflection, what is the term for the original point before the transformation is applied?
8. What does the notation $S'$ represent in the context of a geometric reflection?
9. A point labeled $M'$ is the result of a reflection. The original point, or pre-image, is labeled as ___.
10. If triangle $LMN$ is reflected to create triangle $L'M'N'$, which point is the image of vertex $N$?