Source: NASA Unit 5, Investigation 1 Activity 1.1, p. 1 of 12
Dec 17, 2015
Sea Level Rise
The table shows the annually averaged change in the sea level since 1888.
Many believe that this increase is due to global warming.
Let x be the number of years since 1900.
Year(Since 1900)
x
Sea Level Change (cm)
y
0 1.5
10 1
20 3
30 4.5
40 7
50 9
60 11.5
70 12.5
80 13.5
90 14
100 17.5
Hubbard Glacier, Alaska, June 2005Source: The original data for this table is from the Permanent Service for Mean Sea Level (PSMSL).
Unit 5, Investigation 1Activity 1.1, p. 2 of 12
Sea Level RiseYear
(Since 1900)x
Sea Level Change (cm)
y
0 1.5
10 1
20 3
30 4.5
40 7
50 9
60 11.5
70 12.5
80 13.5
90 14
100 17.5
Hubbard Glacier, Alaska, June 2005
If this trend continues, predict how much the sea level will have risen by 2010 and 2020.
Unit 5, Investigation 1
Activity 1.1, p. 3 of 12
Year(Since 1900)
x
Sea Level Change (cm)
y
0 1.5
10 1
20 3
30 4.5
40 7
50 9
60 11.5
70 12.5
80 13.5
90 14
100 17.5
One approach to making our prediction is to graph the data in the table to determine if there is a trend.
Unit 5, Investigation 1Activity 1.1, p. 4 of 12
How can we effectively use this scatter plot to make our predictions?
Unit 5, Investigation 1Activity 1.1, p. 5 of 12
How do we use the trend line to help us make our predictions?
Unit 5, Investigation 1Activity 1.1, p. 6 of 12
Use the equation to predict how much the sea level will have risen by the year 2010 and the year 2020.
1 1
6 3y x
Unit 5, Investigation 1Activity 1.1, p. 10 of 12