To find the average of a set of numbers, we need to add up all of the numbers and divide by the amount of numbers we added.
Finding the average:
total = 2.5 + 4.6 + 6.75 + 4.8
total = 18.65
number of values added together = 4
average = 18.65 / 4
average = 4.66
The average distance Isabella ran is 4.66 miles.
Hope this helps!! :)