Point [tex]A(7,3)[/tex] is translated to [tex]A^{\prime}(16,-9)[/tex]. Which rule describes the translation?

A. [tex](x, y) \rightarrow(x-9, y-12)[/tex]
B. [tex](x, y) \rightarrow(x-9, y+12)[/tex]
C. [tex](x, y) \rightarrow(x+9, y+12)[/tex]
D. [tex](x, y) \rightarrow(x+9, y-12)[/tex]



Answer :

To determine the translation rule that correctly describes how point [tex]\( A(7,3) \)[/tex] is translated to [tex]\( A^{\prime}(16,-9) \)[/tex], follow these step-by-step instructions:

1. Initial Coordinates and Translated Coordinates:
- The initial coordinates of point [tex]\( A \)[/tex] are [tex]\( (7, 3) \)[/tex].
- The coordinates of the translated point [tex]\( A^{\prime} \)[/tex] are [tex]\( (16, -9) \)[/tex].

2. Calculate the Translation in the x-direction:
- Subtract the initial x-coordinate from the translated x-coordinate:
[tex]\[ x_{\text{translation}} = x_{\text{translated}} - x_{\text{initial}} = 16 - 7 = 9 \][/tex]
Hence, the translation in the x-direction is 9 units to the right.

3. Calculate the Translation in the y-direction:
- Subtract the initial y-coordinate from the translated y-coordinate:
[tex]\[ y_{\text{translation}} = y_{\text{translated}} - y_{\text{initial}} = -9 - 3 = -12 \][/tex]
Hence, the translation in the y-direction is 12 units downward.

4. Form the Translation Rule:
- The translation described by [tex]\( x_{\text{translation}} \)[/tex] and [tex]\( y_{\text{translation}} \)[/tex]:
[tex]\[ (x, y) \rightarrow (x + x_{\text{translation}}, y + y_{\text{translation}}) \][/tex]
Substituting the values we calculated:
[tex]\[ (x, y) \rightarrow (x + 9, y - 12) \][/tex]

Therefore, the correct rule that describes the translation of point [tex]\( A(7, 3) \)[/tex] to point [tex]\( A^{\prime}(16, -9) \)[/tex] is:
[tex]\[ (x, y) \rightarrow (x + 9, y - 12) \][/tex]

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