A power function of the form ()=^ f(x)=ax^b is used to model the wind chill , in degrees Fahrenheit, with wind speed
x, in miles per hour, when the temperature is 30°

A) It is the wind chill when the temperature is 30°
30 °F and the wind speed is 0 miles per hour.

B)It is the wind chill when the temperature is 0°
0° F and the wind speed is 0 miles per hour.

C) It is the wind speed in miles per hour when the temperature is 30° and the wind is 0.

D) It is the wind speed in miles per hour when the temperature is 0° and the wind chill is 0°.