Hi! Basically this is the exercise:
Given the covariance of x and y is -12 and the variance of x is 6,5, using the least squares line of best fit connecting x and y yo estimate the value of x when y=15
x
2
5
9
7
9
10
7
y
25
17
11
10
8
7
13
any help would mean everything, I'm desperate :(