c. Find the equation of the least squares line. d. Use your answer from part c to predict the poverty level in the year 2018.
c. Find the equation of the least squares line. d. Use your answer from part c to predict the poverty level in the year 2018.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
How do you do questions C and D?

Transcribed Image Text:20. Poverty Levels The following table lists how poverty level
income cutoffs (in dollars) for a family of four have changed
over time. Source: U.S. Census Bureau.
Year
1980
1985
1990
1995
2000
2005
2008
Income
8414
10,989
13,359
15,569
17,604
19.961
22,207
Let x represent the year, with x = 0 corresponding to 980 and
y represent the income in thousands of dollars.
a. Plot the data. Do the data appear to lie along a straight line?
b. Calculate the correlation coefficient. Does your result agree
with your answer to part a?
c. Find the equation of the least squares line.
d. Use your answer from part c to predict the poverty level in
the year 2018.
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