This template aims to give students who wants to take notes in class, which provides an elegant layout.
• Times New Roman: https://freefontsfamily.com/times-new-roman-font-free/
• cwTeX: https://github.com/l10n-tw/cwtex-q-fonts
In this note, we will show how transformations can be used to obtain a radically simple derivation of the equation of the line of best fit. Our approach also gives a simple geometric interpretation of the Pearson correlation coefficient.