A triangle with vertices , , and is first translated 4 units to the left and 1 unit up. Then, the resulting triangle is reflected across the axis. What are the coordinates of the image of vertex ?
Options
A
B
C
D
Answer & Analysis
Answer
A
Analysis
Question Analysis:
This question requires applying a translation followed by a reflection across the axis to a vertex of a triangle.
The main focus is correctly executing each transformation step for the given point.
Key Concept Explanation:
1. Translation rule: For a translation units left and units up, a point transforms to .
2. Reflection across the axis rule: When reflecting a point across the axis, the new coordinates are .
Step - by - Step Solution:
1. Translation of point :
- Given a translation 4 units to the left () and 1 unit up ().
- Using the translation rule , substitute and
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