The figure to the right depicts the graph of the equation y = 1/r. Q y=1/x dx Points P and Q are given as points dt of intersection of a tangent line with 2 the r- and y-axes, respectively. If P is moving to the right at 5 mm/sec, how fast is Q moving down when P 1 is 2 mm from the y-axis? P X 2 3 TAXI mm/sec Y= X given : 1 = 1 1 x (B) 2 mm/sec - 2 (C) 3 mm/sec Y = - 1x Y = (D) 4 mm/sec (E) 5 mm/ sec Y = ox X 2 ax