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A circle with centre (−3, 3) touches the Y-axis at (0, 3). What is its equation?
A(x − 3)² + (y + 3)² = 9
B(x + 3)² + (y − 3)² = 3
C(x + 3)² + (y − 3)² = 9
D(x + 3)² + (y + 3)² = 9
Answer & Solution
Correct answer: C. (x + 3)² + (y − 3)² = 9
The radius is the distance from the centre to the Y-axis, 3, so (x + 3)² + (y − 3)² = 9.
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