Question

The population of a country is expected to drop by 30% over the next 50 years as the percent of its citizens that are elderly increases. Projections for the country's population through 2050 are shown in the table.

Year, t |
2005 | 2010 | 2020 | 2030 | 2040 | 2050 |
---|---|---|---|---|---|---|

Population, P (in millions) |
127.8 | 127.3 | 124.1 | 117.6 | 109.5 | 100.6 |

(b) Use the

P =

(c) Identify the slope of the model from part (b). (Round your answer to two decimal places.)

(d) Use the linear model to predict the population in 2015, 2035, and 2060. (Round your answers to one decimal place.)

Are these predictions reasonable?

Step 1

**Output:**

In Excel, enter the data in cells A1 to A7 (*t*) and B1 to B7 (*P*); the first row is for labels.

Go to Data > Data Analysis > Regression.

Enter Input Y Range as $B$1:$B$7 and Input X Range as $A$1:$A$7.

Click on the box for Labels.

Click OK.

The regression output will be obtained.

To get the fi...

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