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Find a Mathematical Model Representing the Statement (y=9 when x=45.)( y = 9 \text { when } x = 45 . )

Question 12

Multiple Choice

Find a mathematical model representing the statement.(Determine the constant of proportionality. ) ​
Y varies inversely as x. (y=9 when x=45.) ( y = 9 \text { when } x = 45 . )


A) y=9xy = \frac { 9 } { x }
B) y=405xy = \frac { 405 } { x }
C) y=x405y = \frac { x } { 405 }
D) y=45xy = \frac { 45 } { x }
E) y=405xy = 405 x

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