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Solutions to Practice Module

1. The data points are (-5,262), (-10,249), (-20,227), (-30,204), (-40,180), (-50,152).


2. The linear regression function is S(t) = 2.401t + 274.362.

3. The slope is m = 2.401; this means that the world population is growing at the rate of 2.401 million (2,401,000) people each year.

4. The annual population growth is 2,401,000 people.

5. In 10 years the population will grow by 24,010,000 people; in 6 months, 1,200,500 people; in one week, 46,173 people.

6. The estimate is 286,367,000 people.

7. In the year 2010 (t = 10.7)