Joseph measures the ropes to tie boats to a dock . He records the lengths of the ropes in feet and then makes a line plot. Joseph concludes that the difference between the longest and shortest lengths is 2 and 1/2 feet. Marta disagrees and says that there is no difference. Who is correct?

Joseph

 is correct because you  

subtract

 the greatest and least lengths represented by the  

intervals

, not the number of  

dots

 at the greatest and least lengths.

Step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.