Part A:The original brand was 12$ each and the new one is 8$ each.
12-8=4
<span>Part B:she will save 16$ each month because y=12*4 and y=8*4 is 16$</span>
The range is the difference between the highest and lowest number.
So the lowest number on this box plot is 5 and the highest is 15, so we will find the difference between them.
15 - 5 = 10.
So the answer to your question should be : 10.
It's easy really.. hope this helps :)
I am pertty sure that is corret