Understanding the Equation of a Sphere

The video tutorial explains how to find the center and radius of a sphere given its equation in standard form. It covers graphing the sphere in three dimensions, identifying the positive and negative axes, and determining the coordinates of the center. The tutorial also explains how to calculate the radius by taking the square root of the right side of the equation. It emphasizes the importance of correctly identifying the signs of the coordinates for the center of the sphere.

What is the main goal when given the equation of a sphere in standard form?

• To find the volume of the sphere

• To determine the center and radius of the sphere

• To calculate the surface area of the sphere

• To identify the color of the sphere

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Which axis is associated with a positive x-coordinate for the center of the sphere?

• Positive x-axis

• Negative z-axis

• Positive y-axis

• Negative x-axis

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If the equation of a sphere includes 'y + 3', what is the y-coordinate of the center?

• 3

• 0

• 5

• -3

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What does the term 'z - 2' in the sphere's equation indicate about the z-coordinate of the center?

• The z-coordinate is 2

• The z-coordinate is 5

• The z-coordinate is 0

• The z-coordinate is -2

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What is the x-coordinate of the center if the equation includes 'x - 5'?

• 10

• 0

• -5

• 5

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What is the significance of the term 'y - (-3)' in the sphere's equation?

• It indicates the y-coordinate is 5

• It indicates the y-coordinate is 3

• It indicates the y-coordinate is -3

• It indicates the y-coordinate is 0

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How do you determine the radius from the equation of a sphere?

• By finding the cube root of the right side

• By halving the right side

• By taking the square root of the right side

• By doubling the right side

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What is the radius of a sphere if the equation's right side equals 16?

• 8

• 4

• 16

• 2

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In the context of the sphere's equation, what does 'r' represent?

• The radius of the sphere

• The diameter of the sphere

• The circumference of the sphere

• The volume of the sphere

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Why is it important to pay attention to the signs of the coordinates in the sphere's equation?

• To calculate the sphere's surface area

• To correctly identify the center of the sphere

• To accurately determine the sphere's volume

• To ensure the sphere is the correct color

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