On average in recent year it cost each passenger about 310 t

On average in recent year it cost each passenger about $310 to travel 3100 miles international by plane.

The unit rate is $ per miles

Solution

We are given cost of each passanger = $310

total distance =3100 miles

so, unit rate = cost of each passanger / total distance

unit rate = $310 / 3100

unit rate = $ 0.1 / miles ..........Answer