Math Problem Statement
What is the image point of left parenthesis, minus, 9, comma, minus, 2, right parenthesis(−9,−2) after the transformation r, start subscript, x-axis, end subscript, circle, T, start subscript, minus, 1, comma, 3, end subscriptr x-axis ∘T −1,3 ?
Solution
Let's break down the transformation step by step:
1. Translation :
The translation means shifting the point by unit along the -axis and units along the -axis.
For the point :
- The new -coordinate will be .
- The new -coordinate will be .
So after the translation, the point becomes .
2. Reflection across the -axis :
To reflect a point across the -axis, the -coordinate remains the same, while the -coordinate changes its sign.
For the point :
- The -coordinate remains .
- The -coordinate becomes .
Thus, after the reflection, the point is .
Final Answer:
The image of the point after the transformation is .
Would you like further details or have any questions? Here are five related questions for further exploration:
- How would the transformation change if the reflection was across the -axis instead?
- What is the matrix representation of a reflection across the -axis?
- How do you calculate the inverse of a translation transformation?
- What happens if you apply the transformations in reverse order?
- How does the slope of a line connecting the original and final points change after these transformations?
Tip: When reflecting across the -axis, only the -coordinate changes, while the -coordinate remains unchanged.
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Math Problem Analysis
Mathematical Concepts
Transformations
Translation
Reflection
Formulas
Translation formula: (x, y) → (x + a, y + b)
Reflection across x-axis: (x, y) → (x, -y)
Theorems
Translation Theorem
Reflection Theorem
Suitable Grade Level
Grades 9-10
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