code: def forward(self, x):
      x -= self.x_mean
      x /= self.x_std
      y_pred = torch.mm(x, self.coefficients).float()
      return y_pred + self.y_mean
  
file_path: hummingbird/hummingbird/ml/operator_converters/_decomposition_implementations.py
imports: import torch
  from ._physical_operator import PhysicalOperator
label_desc: Use image node_id 2 for calling the CrossDecomposition obj's underlying member method code with example usage: obj.forward(x) and returns: unknown