Small calculators are assembled on a production line.A supervisor is interested in studying the production rate on one part of the line to see how the number of items produced by a worker varies as a function of the time spent on the line.Six workers are randomly selected for observation and the number of pieces completed is noted for each after a predetermined length of time has elapsed.

Time Spent on Production Line (min.)

15

22

28

23

30

20

Number of Units Assembled

1

3

5

4

5

3

1. Develop the linear regression equation for these data.
2. How many units would a worker produce if they spent 18 minutes on the line?