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1 2 3 4 6 19 TIME REMAINING 52:40 The table shows data from a concession stand, representing weekly sales (x) in dollars and profit (y) in dollars X 1,250 1,485 1,535 1,880 1,950 2,005 2,425 2,535 2,675 y 755 905 930 1,140 1,175 1,215 1,480 1,535 1,625 When using the median-fit method with summary points (1,485, 905), (1,950, 1,175), and (2,535, 1,535), what is the approximate slope of the best-fit model? O 18 31 O O O 31 18