Answer:
The answer is on the paper. Hope it's correct :)

so, let's first change the bounds from 1 to 9, so we'll be dropping the indices by 1, in order to do the variable "n".
however, let's use a variable hmmm say "k", where "k" is the value of "n" beginning at 1, thus
k = n - 1.
however, if k = n - 1, then
k + 1 = n. So let's use those fellows then,
Answer: -8^4
Step-by-step explanation:
Answer:
the equatopion of the line of the best fit for this data will be 15