the data below represent the number od days absent x and the final grade y for a sample of college students at a large university. complete parts a trhough e below

no of absences x 0 1 2 3 4 5 6 7 8 9

final grade y 88.1 85.3 82.4 80.0 77.0 72.7 63.0 67.7 64.9 62.1

find the least squares regression line treating number of absences x as the expanatory and final grade y as the respone variale

a. y= __x + __

b interpret the slope