Answer:
The range is the highest and lowest numbers in a set of data that are subtracted to show the difference in the set. Numbers weren't given in this equation to make a set of data (other then the days listed). I will give you an example of range to help you out.
Set of data:
{4, 6, 9, 3, 7}
after ordering the numbers, the set is
3, 4, 6, 7, 9
The smallest and largest numbers are 3 and 9
Subtract 9-3
Range= 6