Kami gets a great job as a wildlife biologist. Her project includes tracking the size of flocks of migrating birds. In looking over past records, Kami finds data that gives the number of cranes C in Izumi, Japan, from 1950 to 1990, where t is the number of years since 1950.

t

0

5

10

15

20

25

30

35

40

C

293

299

438

1573

2336

3649

5602

7610

9959

1. Which variable is the independent variable?

2. Which variable is the dependent variable?

3. Does the data show an increase that changes by a constant amount or by a constant rate?

4. Find a good model for the data. What is the function you wrote?

5. Kami is missing the data for the year 2000. What is a good estimate for the number of cranes in Izumi in that year?