R help - Feb 2010 - Non-linearity test in R

Hi All,

I'm fitting a linear (multiple) regression model with 3 predictors + their
interactions.

Can anyone suggest some test in R which can help me know whether I need a
non-linear (regression) model or some transformation? I'm mostly concerned
about finding a way to know whether I should fit a Non-linear model...

Thanks,
Kim

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