Geometry

Question Analysis:
This question involves the geometric transformation of reflection across the line .
The main focus is on applying the rule for reflecting a point across this particular line.

Key Concept Explanation:
When reflecting a point across the line , the new coordinates are obtained by swapping the and coordinates and changing their signs.
That is, if we have a point reflected across , the image point is .

Step - by - Step Solution:
Given the point . To find its reflection across the line , we apply the rule