Final answer:
The proportional relationship between distance driven and gas used in driving habits affects fuel efficiency, encouraging people to adopt fuel-efficient habits to save money and reduce fuel consumption.
Step-by-step explanation:
Driving habits and fuel efficiency are impacted by the fact that the distance you drive is proportional to the amount of gas used. When the distance driven increases, more gas is consumed. This means that if you drive more, you will need to purchase more gas. On the other hand, if you drive less, you will use less gas. Therefore, this proportional relationship encourages people to adopt fuel-efficient driving habits in order to save money and reduce fuel consumption.