A cab company charges $12 per mile for a lift to the airport.

What change would the company make to their charges to make this a non proportional situation?

To make this a non-proportional situation, the company would need to change their pricing structure. Instead of charging a flat rate per mile, they could introduce additional fees or charges based on factors other than distance. For example, they could add a fixed base fare in addition to the per-mile rate, charge extra during peak hours, or implement surge pricing based on demand. These additional fees or charges would make the situation non-proportional as the total cost would no longer be directly proportional to the distance traveled.