PART B: Short Answer.

1) Suppose you collect data that models the relationship betweengrades on a test(Y) versusattendance in class(X). If you calculatearegression lineof:

y=35 + 3.5x

a) Describe the meaning of theslope in the context of the given variables.(2 marks)

b) Describe the meaning of the y-intercept in the context of the given variables.(2 marks)

c) Predict the expected grade of a student who attended 8 classes. We will assume that 8 fits with the domain of x values. SHOW WORK(2 marks)

2) Comment on what it means when the correlation coefficient "r" is (1 mark each):

1. + 1
2. - 1
3. 0