Homework:

These numbers are the utility expenses for a one-year period. Graph the expenses. Then answer the questions.

Jan Feb Mar Apr May June Jul Aug Sept Oct

800 700 600 400 400 600 800 900 600 700

Nov Dec

700 800

1. In which months was the same amount of utility expenses?

2. What is the total annual amount of expenses for utilities?

3. What percent of the total yearly amount was the total expenses for the warm-weather months of June - September?

4. Between which months was there a 100% increase in the amount of expenses for utilities?

5. At the end of December in the year shown, the homeowners replaced their furnace with a more energy-efficient one. They were told that they could decrease their utility expenses for the upcoming month of January by 20% from the previous January amount. How much will the expenses be in the next Januar