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)
s <- summary(mod)
# save the coefficient matrix to `coefs`
# save the coefficient matrix to `coefs`
coefs <- s$coefficients
test_predefined_objects("s")
test_object("coefs")