Description: A Function that returns a linear regression channel using (X,Y) vector points.
Inputs: _X: Array containing x data points.¹ _Y: Array containing y data points.¹
Note: ¹: _X and _Y size must match.
Outputs: _predictions: Array with adjusted _Y values at _X. _max_dev: Max deviation from the mean. _min_dev: Min deviation from the mean. _stdev/_sizeX: Average deviation from the mean.