Nothing
options(digits = 4)
rnorm(20)
fit = lm(dist ~ speed, data = cars)
b = coef(fit)
summary(fit)$coefficients
par(mar=c(4, 4, 1, .1))
plot(cars, pch = 20)
abline(fit, col = 'red')
print(citation('knitr'), style = 'html')
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