Answer: (5,3).
- A (5,3)
- B (-5,-3)
- C (3,5)
- D (-3,-5)
Correct answer: A. (5,3)
Explanation: Reflection in y = x swaps coordinates: (3,5) becomes (5,3).
The slope of a line is the ratio of vertical change (rise) to horizontal change (run) between any two points on it - equivalently, the tangent of the angle θ the line makes with the positive x-axis.