Where does z = wx+b?

Screenshot 2023-10-21 at 3.08.52 PM

Where does z = wx+b? Any tips is appreciated.

Sorry, but I don’t understand your question.

In this screenshot, the sigmoid function has been generalized by only showing z as an exponent of e. The equality z=wx+b implies that the linear regression function is to be substituted for z in order to calculate the output of a sigmoid node/output as logistical form.