Choose the best answer.
Each Sunday, Mario weighs himself. Here are his weight changes over a 4-week period.
Week 1 2 3 4
Weight Change –1.8 +0.9 –1.4 +0.4
How much has Mario's weight changed over the entire four weeks?
Question 3 options:
1.9 pounds
–1.9 pounds
–4.5 pounds
4.5 pounds