Part 1: How's the weather?

Investigate the weather forecast in your city.

Record the high and low temperatures that are forecast for the next 7 days in the table below. In the columns titled, Difference," record the change in temperature from the day before. To do this, subtract the previous temperature from the current temperature Be sure to use positive and negative numbers as needed! For example, if yesterday’s temperature was 70 and today’s temperature was 65, the difference is 65 – 70 = -5.



Date

High Temperature

Subtract previous temperature from current temperature

Difference

Low Temperature

Subtract previous temperature from current temperature

Difference

1



68

-N/A-

-N/A-

57

-N/A-

-N/A-

2



60

60-36=24

24

36

36-24=12

12

3



60

60-30=30

30

30

30-30=0

0

4



69

69-31=39

39

31

39-31=8

8

5



76

76-47=31

31

47

47-31=10

10

6



82

82-56=26

26

56

56-26=30

30

7



83

83-63=20

20

63

63-20=43

43

Note: The columns for Day One's subtraction and difference cannot be filled in. As this is the first data point, there is no previous temperature to subtract.

Write a mathematical expression using the information from your table to answer the following questions:


What is the mean change in the forecasted high temperatures over the next 7 days? Remember, this can be found by averaging the values in the Difference column for the high temperatures. Show your work and steps. If your answer is not an integer, explain what two integers your answer is between.





What is the mean change in the forecasted low temperatures over the next 7 days? Remember, this can be found by averaging the values in the Difference column for the low temperatures. If your answer is not an integer, explain what two integers your answer is between.