Business The following table shows the total private philanthropy donations (in billions of dollars) for various years. (Data from: Center on Philanthropy at Indiana University.)
Year | 1990 | 1995 | 2000 | 2005 | 2010 |
Philanthropy | 101 | 124 | 230 | 288 | 287 |
(a) Let x = 0 correspond to the year 1990, and find the leastsquares regression line for the data.
(b) Graph the data from the years 1990 to 2010 with the leastsquares regression line.
(c) Does the least-squares regression line form a good fit?
(d) What is the correlation coefficient?
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