The following data represent the maximum wind speed (in knots) and atmospheric pressure (in millibars) for a random sample of hurricanes that originated in the Atlantic Ocean. (Refer to Problem 30, Section 4.1)

(a) Find the least-squares regression line treating atmospheric pressure as the explanatory variable.
(b) Interpret the slope.
(c) Is it reasonable to interpret the y-intercept? Why?
(d) One hurricane had an atmospheric pressure of 997 mb. Is this hurricane's wind speed above or below average for a hurricane with this level of atmospheric pressure?

Wind Speed Atmospheric Wind Speed Atmospheric Pressure (mb) (knots) Pressure (mb) (knots) 993 50 1006 40 942 995 60 120 994 1002 40 986 997 45 50 1003 45 983 70 1004 40 994 65 1000 55 940 120 994 55 976 80 942 105 966 100 1006 30 982 55