[R] Confidence Intervals on Standard Curve

[nzcoops]

model <- lm(Approximate.Counts~X..Light.Transmission +
I(Approximate.Counts^2), data=Standards) 

Might not be addressing the problem, don't you have Y ~ X + Y^2 here? That's
a violation of the assumptions of an lm isn't it?

Also for plotting CI on a curve look into ggplot2::geom_ribbon, it's much
nicer than just plotting lines and is easy to use. had.co.nz should set you
right for setting this up.
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