(a) Suppose you are given the following (x, y) data pairs.

x	1	2	6
y	2	1	8

Find the least-squares equation for these data (rounded to four digits after the decimal).

(b) Now suppose you are given these (x, y) data pairs.

x	2	1	8
y	1	2	6

Find the least-squares equation for these data (rounded to four digits after the decimal).

(d) Solve your answer from part (a) for x (rounded to four digits after the decimal). x = ___ + ___ y