If y varies inversely as the square of x, and y=4/63 when x=3, find y when x=5

By setting up a proportion, we can solve it. Since y is inversely related to the square of x, we can write that
                    y=4/639 (square of x)
                    y=?      25 (square of x) and according to the inverse relation, we'll write that
                      y=4/6325 
                      y=?9 and y=4/175