Y varies inversely as the square of x. This relationship can be expressed as

where k is a constant. we need to find the value of k
To do that, we use the provided data, y = 9 when x = 15. Substituting in the above equation:

Solving for k:

The equation is, then:

We finally need to find the value of y when x = 2:

y is 506.26 when x = 2