Circle \( J \) is located in the first quadrant with center \( (a, b) \) and radius \( s \). Felipe transforms Circle \( J \) to prove that it is similar to any circle centered at the origin with radius \( t \). Which sequence of transformations did Felipe use? (A) Translate Circle \( J \) by \( (x+a, y+b) \) and dilate by a factor of \( \frac{t}{S} \). Translate Circle \( J \) by \( (x+a, y+b) \) and dilate by a factor of \( \frac{S}{t} \). (C) Translate Circle \( J \) by \( (x-a, y-b) \) and dilate by a factor of \( \frac{t}{s} \). (D) Translate Circle \( J \) by \( (x-a, y-b) \) and dilate by a factor of \( \frac{S}{t} \).
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The Deep Dive
To transform Circle \( J \) centered at \( (a, b) \) with radius \( s \) into a circle centered at the origin with radius \( t \), Felipe first needs to translate the circle. The translation should shift the center from \( (a, b) \) to \( (0, 0) \), which is achieved by moving \( (x, y) \) to \( (x-a, y-b) \). After that, he dilates the circle to adjust its radius from \( s \) to \( t \). The appropriate factor for this dilation is \( \frac{t}{s} \). Therefore, the correct sequence of transformations is: (C) Translate Circle \( J \) by \( (x-a, y-b) \) and dilate by a factor of \( \frac{t}{s} \).