A Director of Human Resources is exploring employee absenteeism at the INCOVA Hospital. A multiple linear regression analysis was performed using the following variables. The results are presented below.

Variable	Description
Y	number of days absent last fiscal year
x1	commuting distance (in miles)
x2	employee's age (in years)
x3	length of employment at PPP (in years)
	Coefficients	Standard Error	t Statistic	p-value
Intercept	6.594146	3.273005	2.014707	0.047671
x1	-0.18019	0.141949	-1.26939	0.208391
x2	0.268156	0.260643	1.028828	0.307005
x3	-2.31068	0.962056	-2.40182	0.018896
R	0.498191
R2	0.248194
Adj R2	0.192089
se	3.553858
n	73

What is the regression equation based on this analysis?

a. Y = 0.18 x1 + 0.27 x2 -0.51 x3

b. Y = 6.59 - 0.18 x1 + 0.27 x2

c. Y = 6.59 - 0.18 x1 + 0.27 x2 - 2.31x3 d. None of the above