Can someone please advise step by step how I would calculate a regression equation, r, and R² for this data below?

using your actual scores for Weeks 1, 2, 3, and 4 and your forecast values, calculate a regression equation, r, and R² for this data.

Week 1:

Forecasted Grades Actual Grades

40 35

35 35

15 15

15 15

Week 2:

Forecasted Grades Actual Grades

35 35

15 15

15 15

Week 3:

Forecasted Grades Actual Grades

35 35

70 70

15 15

15 0

Week 4:

Forecasted Grades Actual Grades

35 33

15 10

15 15

Please answer the following questions from your data

Question 1: What data did you use in your regression equation? Which is the independent and dependent variable?

Question 2: What is the regression equation, r, and R²for your data

Question 3: Statistically, what does r and R²tell you?

Question 4: Based on your empirical evidence, how well did you forecast your results? Justify your response.