Final answer:
The wagon train trip would take approximately 5.33 days.
Step-by-step explanation:
The average speed of the wagon train can be calculated by dividing the total distance travelled by the time taken to cover that distance. In this case, the wagon train travels 15 miles per day. Therefore, the trip will take approximately 80 miles ÷ 15 miles per day ≈ 5.33 days.