A meteorologist is interested in the relationship between the maximum wind speed and the

central pressure of a hurricane. Based on a sample of 164 hurricanes, the least squares regression

line is

= 1133

-

1.07

x

, where

x

is central pressure (in millibars) and

y

is the maximum wind

speed (in miles per hour). Which of the following best describes the slope of the least squares

regression line?

(A)

For each one millibar increase in pressure, the estimated maximum wind speed increases by

1.07 miles per hour.

(B)

For each one millibar increase in pressure, the estimated maximum wind speed decreases by

1.07 miles per hour.

(C)

For each one mile per hour increase in maximum wind speed, the estimated pressure

increases by 1.07 millibars.

(D)

For each one mile per hour increase in maximum wind speed, the estimated pressure

decreases by 1.07 millibars.

(E)

The slope has no meaning because the units of measure for

x

and

y

are not the same.