demand for certain product has been as follows;

Month / Demand

1 / 41

2 / 46

3 / 57

4 / 52

5 / 59

6 / 51

7 / 60

8 / 62

9 /

10 /

11 /

1.) Find the regression equation:

2.) Use the regression equation to determine the demand for months 9, 10 and 11