The frequency of vibration f of a mass m suspended from a spring of spring constant k is given by a relation of the type f = c m k', where c is a dimensionless constant. The values of x and y are (a) x = 2/1, y = 1/2 (b)x= -1, y = - 12/2 (c) x = 1, y = - (d) x = -1, y = 2 12112