Source: NASA

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Unit 5, Investigation 1 Activity 1.1, p. 1 of 12

• Source NASA
• Source NASA

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Sea Level Rise
Unit 5, Investigation 1 Activity 1.1, p. 2 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

• 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.

Source The original data for this table is from
the Permanent Service for Mean Sea Level (PSMSL).
Hubbard Glacier, Alaska, June 2005
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Sea Level Rise
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

• If this trend continues, predict how much the
  sea level will have risen by 2010 and 2020.

Hubbard Glacier, Alaska, June 2005
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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 1 Activity 1.1, p. 4 of 12
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• How can we effectively use this scatter plot
  to make our predictions?

Unit 5, Investigation 1 Activity 1.1, p. 5 of 12
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• How do we use the trend line to help us make
  our predictions?

Unit 5, Investigation 1 Activity 1.1, p. 6 of 12

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Unit 5, Investigation 1 Activity 1.1, p. 7 of 12
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• Find the equation of the trend line.

Unit 5, Investigation 1 Activity 1.1, p. 8 of 12
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Unit 5, Investigation 1 Activity 1.1, p. 9 of 12
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Use the equation to predict how much the sea
level will have risen by the year 2010 and the
year 2020.
Unit 5, Investigation 1 Activity 1.1, p. 10 of 12
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Unit 5, Investigation 1 Activity 1.1, p. 11 of 12
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Use the equation to predict by which year the
sea level will have risen 50 centimeters since
1888.
If this trend continues, by 2198, the sea
level will have risen 50 centimeters since 1888.
Unit 5, Investigation 1 Activity 1.1, p. 12 of 12