The quantity y is partly constant and partly varies inversely as the square of x. With P and Q as constants, a possible relationship between x and y is

• A.y = Q + \(\frac{P}{x^2}\)
• B.y = Q + px
• C.y = \(\frac{PQ}{x^2}\)
• D.y = Q - \(\frac{P}{x^2}\)
• E.