missashleyn
What is the equation of this circle?
(x – 1)2 + y2 = 2
(x + 1)2 + y2 = 4
(x + 1)2 + y2 = 2
(x – 1)2 + y2 = 4



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missashleyn
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jim_thompson5910
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can you point out or identify the center?

missashleyn
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Yes, 1?

jim_thompson5910
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1 comma what

missashleyn
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1,0

jim_thompson5910
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1 is the x coordinate

jim_thompson5910
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better

jim_thompson5910
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so how many units away is that center point from any other point on the circle

missashleyn
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So the radius is 2 so the answer is (x – 1)2 + y2 = 4?

jim_thompson5910
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good you nailed it