Problem

In the following problem, determine whether a straight line is a good model for the data....

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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Solutions For Problems in Chapter 2.3