code: def _poly_fcn(B, x, powers):
      a, b = B[0], B[1:]
      b.shape = (b.shape[0], 1)
  
      return a + np.sum(b * np.power(x, powers), axis=0)
  
imports: import numpy
  from scipy.odr.odrpack import Model
label_desc: Use image node_id 5 for calling a global function with example usage: _poly_fcn(B, x, powers) and returns: unknown