The following table shows the average annual income in a certain country, adjusted for inflation, for the given year. t- years since 1980 I - annual income $23,209 $23,216 10 $25,284 15 $26,594 $30,819 $30,450 $28,938 20 25 30 (a) Find the equation of the regression line. (Round regression line parameters to two decimal places.) I(t) = (b) Plot the data along with the regression line.

Algebra and Trigonometry (6th Edition)
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ChapterP: Prerequisites: Fundamental Concepts Of Algebra
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Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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(c) Explain in practical terms the meaning of the slope of the regression equation. (Round your answers to two decimal places.)
The slope of the regression line is
dollars per year. The slope means that, from 1980 on, the average annual income (adjusted for inflation) grew by $
each year
(d) During which year since 1990 was income much lower than would be expected from the regression model?
O 1995
O 2000
O 2005
O 2010
Transcribed Image Text:(c) Explain in practical terms the meaning of the slope of the regression equation. (Round your answers to two decimal places.) The slope of the regression line is dollars per year. The slope means that, from 1980 on, the average annual income (adjusted for inflation) grew by $ each year (d) During which year since 1990 was income much lower than would be expected from the regression model? O 1995 O 2000 O 2005 O 2010
The following table shows the average annual income in a certain country, adjusted for inflation, for the given year.
t- years since 1980
I - annual income
$23,209
$23,216
$25,284
$26,594
$30,819
$30,450
$28,938
10
15
20
25
30
(a) Find the equation of the regression line. (Round regression line parameters to two decimal places.)
I(t) =
(b) Plot the data along with the regression line.
Transcribed Image Text:The following table shows the average annual income in a certain country, adjusted for inflation, for the given year. t- years since 1980 I - annual income $23,209 $23,216 $25,284 $26,594 $30,819 $30,450 $28,938 10 15 20 25 30 (a) Find the equation of the regression line. (Round regression line parameters to two decimal places.) I(t) = (b) Plot the data along with the regression line.
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