To test if listening to Mozart and mood are related, a scientist records the time spent listening to Mozart in minutes (X) and the corresponding change in mood among 8 participants with a history of depression. The data are given in table 2

Time Spent Listening to Mozart(mins)Change in Mood XY 3224 2420 2825 1722 1216

1. Compute the method of least squares to find the equation of the regression line.
2. Use the regression equation computed in part (a) to determine the predicted change in mood of a person who spends 20 minutes listening to Mozart.