linear regression: predict the population in 2010

[jccurtis]

According to the US Bureau of the Census, Statistical Abstract of the United States, 1994, the population of the state of Wisconsin in thousands is as given in the table below:

          Population
Year    (in thousands)

1970         7432
1980         9438
1990        12104
2000        14102

Let "x" represent the number of years since 1970.

1) Find the equation of the line representing this relationship using linear regression.

y=ax+b

y=226.76X + 7367

2) Use this equation to predict the population of Wisconsin in the year 2010.

y=226.76(4) +7367
y=907.04 +7367
y=8274.04

Let me know if I am way off here please

 

[Denis]

          Population
Year    (in thousands)

1970         7432
1980         9438
1990        12104
2000        14102

2010: y=8274.04

JC, if you think 8274 is possibly correct (after seeing the 1970-2000 data),
then you need a teacher...and there's no teacher here

 

[mcrae]

look at the population increase evrey ten years.. its about 2000, so in 2010 it will probably be around 16000 dont you think? (your equation is wrong)

 

[galactus]

Always make a graph to see if it works out.

Your equation is good. You found the population for 1974 instead of 2010.

x should be 40, not 4.