Can a low barometer reading be used to predict maximum wind speed of an approaching tropical cyclone? For a random sample of tropical cyclones, let x be the lowest pressure (in millibars) as a cyclone approaches, and let y be the maximum wind speed (in miles per hour) of the cyclone. x 1004 975 992 935 983 922 y 40 100 65 145 78 150 Use a calculator to verify that Σx = 5811, Σx2 = 5,633,303, Σy = 578, Σy2 = 65,434 and Σxy = 552,689.

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