Example Program Data for nag_lin_reg_ex01
  8                   : number of data points
  1.0       20.0      : X, Y
  0.0       15.5
  4.0       28.3
  7.5       45.0
  2.5       24.5
  0.0       10.0
 10.0       99.0
  5.0       31.2