(a) Suppose you are given the following (x, y) data pairs. x1 3 4 21 8 A USE SALT Find the least-squares equation for these data (rounded to four digits after the decimal). Enter a number. (b) Now suppose you are given these (x, y) data pairs. 3 4 Find the least-squares equation for these data (rounded to four digits after the decimal). x + (C) In the data for parts (a) and (b), did we simply exchange the x and y values of each data pair? . Yes No (d) Solve your answer from part (a) for x (rounded to four digits after the decimal). Do you get the least-squares equation of part (b) with the symbols x and y exchanged? Yes . No

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