Hello, can you please help me A.Math - Least Square method? Can you please also show me step by step how to do part b using Excel? Thanks a lot!

Straight line of least square: In the plan, the following eight points are given.

a) Establish the equation of the corresponding line of least squares. b) Using Excel, draw the points (Insert/Graph/Scatterplot). Then the right (Trend line/Other options) and display the equation of the line and the linear correlation coefficient.

\begin{tabular}{|c|c|c|c|c|c|c|c|c|} \hlinex & 1 & 3 & 4 & 6 & 8 & 9 & 11 & 14 \\ \hliney & 1 & 2 & 4 & 4 & 5 & 7 & 8 & 9 \\ \hline \end{tabular}