PART B: Short Answer.

1) Suppose you collect data that models the relationship between grades on a test (Y) versus attendance in class (X). If you calculate a regression line of:

y = 35 + 3.5x

a) Describe the meaning of the slope 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):

a) + 1

b) - 1

c) 0