Math Problem Statement

What is the image point of left parenthesis, minus, 3, comma, minus, 2, right parenthesis(−3,−2) after the transformation r, start subscript, x-axis, end subscript, circle, R, start subscript, 270, degrees, end subscriptr x-axis ​ ∘R 270 ∘

Solution

To solve the transformation of the point (3,2)(-3, -2) under the combined transformations of reflection across the xx-axis (rxaxis)(r_{x-axis}) and a rotation of 270270^\circ counterclockwise (R270)(R_{270^\circ}), we need to break down the process into two steps:

  1. Reflection across the xx-axis: The reflection across the xx-axis transforms a point (x,y)(x, y) to (x,y)(x, -y).

    • For the point (3,2)(-3, -2), after reflecting across the xx-axis: rxaxis(3,2)=(3,2)r_{x-axis}(-3, -2) = (-3, 2)
  2. Rotation by 270270^\circ counterclockwise: A 270270^\circ counterclockwise rotation transforms a point (x,y)(x, y) to (y,x)(y, -x).

    • Applying this rotation to the point (3,2)(-3, 2) (the result of the reflection): R270(3,2)=(2,3)R_{270^\circ}(-3, 2) = (2, 3)

Thus, the image of the point (3,2)(-3, -2) after the combined transformation rxaxisR270r_{x-axis} \circ R_{270^\circ} is (2, 3).

Would you like further details on this process?

Here are 5 related questions to deepen your understanding:

  1. How does a rotation of 9090^\circ counterclockwise differ from 270270^\circ?
  2. What is the general formula for reflecting a point across the yy-axis?
  3. What happens when a point is rotated 180180^\circ counterclockwise?
  4. How does the combination of transformations affect the overall result?
  5. What would the point be after only applying the reflection without the rotation?

Tip: Always apply transformations in the correct order, as reversing them can yield different results.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Transformations
Reflection
Rotation

Formulas

Reflection across the x-axis: (x, y) → (x, -y)
Rotation by 270° counterclockwise: (x, y) → (y, -x)

Theorems

Reflection Theorem
Rotation Theorem

Suitable Grade Level

Grades 8-10