Chapter 14.1, Problem 17P

For each of the following transformations, describe what the transformation does to the coordinates of points. How are the coordinates of a point and its image related? Explain in detail how you can tell. Does the answer depend on whether the coordinates are positive or negative or can you give a single rule that applies to all points in the plane?

1. A reflection across the X-axis.
2. A reflection across the Y-axis.