The following table lists how poverty level income cutoffs (in dollars) for a family of four have
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The following table lists how poverty level income cutoffs (in dollars) for a family of four have changed over time.
Let x represent the year, with x = 0 corresponding to 1990, 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 2030.
Transcribed Image Text:
Year 1990 1995 2000 2005 2010 2015 2018 Income 13,359 15,569 17,604 19,971 22,315 24,257 25,701
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a b c d The year 2030 corresponds to x 40 Y 441140 13335 30979 The predi...View the full answer
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