In Linear Regression Video Lecture for Visualizing Loss function, the values of theta are
array([ 0.68364861, 79.87998953])
Later on the chosen range of points to create the numpy array is as
T0=np.arange(-50,50,1)
T1=np.arange(40,120,1)
On what basis is the range for T0 chosen as -50 to 50 if the value of T0 is 0.683…?