Roy Lewallen wrote:
I'm sure that somewhere in one of your texts you can find the definition
of linear as applied to networks. Once you do, though, a little thought
is required to discover that y = mx + b doesn't satisfy the criteria for
network linearity.

You have missed the point, Roy. It is the relationship between
functions that has to be linear. If f(x) is the input and y
is the output where y = h(x) = k*f(x), a plot of the output
Vs input will yield a straight line of the form mx + b.
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73, Cecil http://www.qsl.net/w5dxp