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julie001

  • 3 years ago

HELPPPPPP ! Patrick drew the incorrect graph shown below to represent the circle (x – 1)2 + (y + 3)2 = 4 Which statement explains why Patrick’s graph is incorrect? The radius of the circle should be 2 instead of 4. The center of the circle should be (1, 9) instead of (1, -3). The center of the circle should be (-1, 3) instead of (1, -3). The radius of the circle should be 16 instead of 4.

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  1. julie001
    • 3 years ago
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  2. allank
    • 3 years ago
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    Kindly clarify. Is the circle equation in this form? (x – 1)^2 + (y + 3)^2 = 4

  3. julie001
    • 3 years ago
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    YES

  4. allank
    • 3 years ago
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    I think the first choice is the answer since the radius of the circle is sqrt4.

  5. julie001
    • 3 years ago
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    thanks! but im gonna get a second opinion just in case

  6. allank
    • 3 years ago
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    no prob

  7. imnotamoose
    • 3 years ago
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    I second allank.

  8. julie001
    • 3 years ago
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    how so

  9. allank
    • 3 years ago
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    This might make it clearer. http://tutorial.math.lamar.edu/Classes/Alg/Circles.aspx

  10. allank
    • 3 years ago
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    ***Quote from the link*** (x-h)^2+(y-k)^2=r^2 This is the standard form of the equation of a circle with radius r and centre (h,k). The equation is (x – 1)2 + (y + 3)2 = 4 Meaning that the radius is sqrt of 4 = 2. In the figure, the radius is about 4. Thus the answer is the first choice.

  11. julie001
    • 3 years ago
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    okay i trust u guys thanks!

  12. allank
    • 3 years ago
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    You're welcome :)

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