The function is , where is the ground speed(air speed wind).

(a)

The function is .

No wind condition :

ground speed = air speed.

mph.

Substitute in the function.

The cost per passenger for quiescent (no wind) conditions is .

(b)

The function is .

Head wind speed = 50 mph.

ground speed = air speed - head wind speed.

Substitute in the function.

The cost per passenger with a head wind of 50 mph is .

(c)

The function is .

Tail wind speed = 100 mph.

ground speed = air speed + tail wind speed.

Substitute in the function.

The cost per passenger with a tail wind of 100 mph is .

(d)

The function is .

Head wind speed = 100 mph.

ground speed = air speed - head wind speed.

Substitute in the function.

The cost per passenger with a head wind of 100 mph is .

(a) The cost per passenger for quiescent (no wind) conditions is .

(b) The cost per passenger with a head wind of 50 mph is .

(c) The cost per passenger with a tail wind of 100 mph is .

(d) The cost per passenger with a head wind of 100 mph is .