cs <- c(23, 19, 30, 22, 23, 29, 35, 36, 33, 25)
ts <- c(430, 430, 333, 410, 390, 377, 325, 310, 328, 375)
mod <- lm(ts ~ cs)
# add the regression line to the scatterplot
plot(cs, ts)
# add the regression line to the scatterplot
plot(cs, ts)
abline(mod)
test_predefined_objects("mod")
test_function("plot")
test_function("abline")