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y is inversely proportional to the square of x.

A table of values for x and y is shown.

X 1 2 3 4
Y 4 1 4/9 1/4

a, Express y in terms of x.

 

b, work out the posative value of x when y = 25

 Apr 4, 2020
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a. \(y=\frac{4}{x^2}\)

b.\(25=\frac{4}{x^2}\) Multiply x^2 on both sides. Use calculator to find that x=positive or negative 2/5

 

coolcoolcool

 Apr 4, 2020

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