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avatar+122 

How do you find x?do you use the same formula you would use to find y

 Nov 7, 2018
 #1
avatar+17209 
+3

Y ~~ 1/x^2         y = k/x^2

 

when y = 4 and x = 1        4 = 1/(1^2)  * k     so k = 4

y=4/x^2

 

25 = 4/x^2       x^2 = 4/25     x = 2/5

 Nov 7, 2018
 #2
avatar+122 
+1

hmm i see but what about a)?

 Nov 7, 2018
 #3
avatar+98044 
+1

a)

 

EP 's first answer in red  ⇒   y  =  4 / x^2

 

 

cool cool cool 

 Nov 7, 2018

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