Math Problem Statement

What is the image of (2, 8) after a reflection over the line y = x?

Solution

This problem asks for the image of the point (2,8)(2, 8) after a reflection over the line y=xy = x. Here's how to solve it step by step:

Step-by-step solution:

  1. Understand Reflection over y=xy = x:

    • When a point (a,b)(a, b) is reflected over the line y=xy = x, the coordinates of the reflected point are swapped. The new coordinates become (b,a)(b, a).
  2. Apply the Transformation:

    • The original point is (2,8)(2, 8).
    • After swapping the coordinates (reflecting over y=xy = x), the new point becomes: (8,2)(8, 2)

Final Answer:

The image of the point (2,8)(2, 8) after reflection over y=xy = x is: (8,2)(8, 2)

Let me know if you need further clarification!


Related Questions:

  1. What is the general rule for reflecting points over the xx-axis or yy-axis?
  2. How do you reflect a point over the line y=xy = -x?
  3. What happens when a point lies on the line of reflection y=xy = x?
  4. How do you reflect a geometric shape (e.g., triangle) over the line y=xy = x?
  5. Can you derive the reflection rule using linear algebra (matrices)?

Tip:

Always verify reflections by considering the symmetry of the line of reflection—points should be equidistant from the line.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Reflections
Transformations

Formulas

Reflection over y = x: (a, b) -> (b, a)

Theorems

Reflection Symmetry

Suitable Grade Level

Grades 9-10