Question: A fundamental distinction between trend projection and linear regression is that trend projection uses two smoothing constants, not just one. trend projection can be a

A fundamental distinction between trend projection and linear regression is that

trend projection uses two smoothing constants, not just one.

trend projection can be a function of several variables, while linear regression can only be a function of one variable.

trend projection uses least squares while linear regression does not.

only linear regression can have a negative slope.

in trend projection the independent variable is time; in linear regression the independent variable need not be time, but can be any variable with explanatory power.

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