The data below provides weekly sales for the past 12 weeks (weeks 21-32).

Week	Sales
21	4,000
22	3,655
23	3,958
24	3,983
25	4,538
26	4,120
27	4,692
28	4,421
29	4,859
30	5,030
31	5,540
32	5,670

Use a three period weighted moving average with weights of 0.5, 0.3 and 0.2 to forecast the week 33 sales.

For this data, what is the linear regression equation for forecasting, and what is the associated R² value?

Equation:

R² =

 What is the linear regression forecast for week 36?