The wind chill function is ,

where represents the wind speed and represents the air temperature.

Find the wind chill in each case.

(a)

An air temperature and a wind speed .

If  then the function is .

Substitute in .

Wind chill is .

(b)

An air temperature and a wind speed .

If  then the function is .

Substitute and in above function.

Wind chill is .

(c)

An air temperature and a wind speed .

If  then the function is .

Substitute and in above function.

Wind chill is .

(d)

An air temperature and a wind speed .

If then the function is .

Substitute in above function.

Wind chill is .

(e)

If then the function is .

The meaning of the above function is, the wind chill is equal to the air temperature.

(f)

If then the function is .

The meaning of the above function is, at wind speed greater than , the wind will chill factor depends only on the air temperature.

(a) .

(b) .

(c) .

(d) .

(e) Meaning of the function is, the wind chill is equal to the air temperature.

(f) Meaning of the function is, at wind speed greater than , the wind will chill factor depends only on the air temperature.