SOLUTION: number of people who live alone has been increasing, as shown by the data in the given table year / Number living alone (in millions) ___________ ________

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Question 327556: number of people who live alone has been increasing, as shown by the data in the given table
year / Number living alone (in millions)
_____________________
1970 / 10.0
1980 / 18.3
1985 / 20.6
1990 / 23.0
1995 / 24.7
2000 / 26.7
_____________________
Find a square root equation that's a reasonable model for this data. Let t represent the number of years after 1970.
Answer by Fombitz(32388) (Show Source):
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1970 / 10.0
1980 / 18.3
1985 / 20.6
1990 / 23.0
1995 / 24.7
2000 / 26.7
Square the data above to get,
1970/ 100
1980/ 334.89
1985/ 424.36
1990/ 529
1995/ 610.09
2000/ 712.89
Fit that to a straight line using EXCEL Chart Wizard,

Take the square root of that equation,

Check the data using the equation comparing to the original data,
1970/ 10.0/10.8
1980/ 18.3/17.8
1985/ 20.6/20.4
1990/ 23.0/22.8
1995/ 24.7/24.9
2000/ 26.7/26.8

SOLUTION: number of people who live alone has been increasing, as shown by the data in the given table year / Number living alone (in millions) ___________ _________ 1970 /

SOLUTION: number of people who live alone has been increasing, as shown by the data in the given table year / Number living alone (in millions) ___ _ 1970 /