Find the Center and Radius of the Circle $x ^ { 2 } + y ^ { 2 } - 16 x + 18 y = - 141$

question 8

Multiple Choice

Find the center and radius of the circle.
- $x ^ { 2 } + y ^ { 2 } - 16 x + 18 y = - 141$

• A) \(( - 9,8 ) , r = 2\)
• B) \(( - 8,9 ) , r = 4\)
• C) \(( 9 , - 8 ) , r = 4\)
• D) \(( 8 , - 9 ) , r = 2\)

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Definitions:

Sign Test

A non-parametric test used to determine if there is a significant difference between the median of two related samples.

Median Amount

The middle value in a set of numbers, which divides the set into two equal halves.

Level Of Significance

A threshold chosen by the researcher which denotes the probability below which a null hypothesis is rejected, indicating statistical significance.

Quality Control

Processes and procedures implemented to ensure that a product or service meets predefined standards of excellence and customer expectations.