A variable y is inversely proportional to x

^{2}, when y = 10, x = 2. What is y when x = 10?-
**A.**

2 -
**B.**

4 -
**C.**

100 -
**D.**

0.4 -
**E.**

0.1

##### Correct Answer: Option D

##### Explanation

y (alpha) (frac{1}{x^2})

y = (frac{k}{x^2})

k = x^{2}y

= (2)^{2} x 10

= 40

y = (frac{40}{x^2})

= (frac{40}{(10)^2})

= (frac{40}{100})

= 0.4