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.

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