### Why pictures are so important when modeling data?

(bis repetita) Consider the following regression summary,Call:
lm(formula = y1 ~ x1)
Coefficients:
Estimate Std. Error t value Pr(__|t|)
(Intercept) 3.0001 1.1247 2.667 0.02573 *
x1 0.5001 0.1179 4.241 0.00217 **... [Read more...]