Final answer:
The Jackson family's unit rate of travel is 54 miles per hour, which is expressed as the fraction 54/1 in miles per hour.
Step-by-step explanation:
To find the unit rate in fraction form for the distance the Jackson family drove, we need to calculate how many miles they traveled per hour. The Jackson family drove 432 miles in 8 hours. To find the unit rate, we divide the total miles by the total hours.
The unit rate is calculated as follows:
Unit rate = Total miles ÷ Total hours = 432 miles ÷ 8 hours
This simplifies down to:
Unit rate = 54 miles/hour
Expressed in fraction form, the unit rate is 54/1 miles per hour.
Thus, the Jackson family traveled at an average speed of 54 miles per hour.