In the following problem, determine whether a straight line is a good model for the data. You may do this either visually, by plotting the data points, or analytically, by finding the correlation coefficient for the least-squares regression line.
Health The accompanying table shows the number of deaths per 100,000 people from heart disease in selected years. Let x = 0 correspond to 1960.
Year | 1960 | 1970 | 1980 | 1990 | 2000 | 2004 |
Deaths | 559 | 483 | 412 | 322 | 258 | 217 |
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