Question

I need help with the steps to solve this please:

This table shows 4 observations of a pair of variables (x,y). The variables x and y are positively correlated with a correlation coefficient of 0.99. Find the slope, b, of the least squares regression line, y=ax+b, for these data:

x 1 2 3 4
y 1 3 7 10

Answer 1

send a picture of it because i dont understond it

Answer 2

\[\left[\begin{matrix}1 & 1 \\ 2 &1\\ 3 & 1\\ 4 & 1\end{matrix}\right]\left(\begin{matrix}m \\ b\end{matrix}\right)=\left(\begin{matrix}1 \\ 3\\7\\10\end{matrix}\right)\]

Answer 3

that is Ax= y
denoting A' as A transpose
x= inv(A'A) A' y