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Y is inversely proportional to the square of x 

when y = 9 x = 1

Find the value of x when y = 16

what I did: 16= 9/x^2 

Guest Jan 25, 2018
 #1
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y  = k /x^2

We need to find k

 

And we know that

 

9 =  k / 1      multiply both sides by 1

 

9  = k

 

So......when y  =  16, we have

 

16  = 9 / x^2     rearrange as

 

x^2  =  9 /16        take the positive root

 

x  =  3 / 4

 

 

cool cool cool

CPhill  Jan 25, 2018

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