A large department store has collected the following monthly data on lost sales revenue due to theft and the number of security guard hours on duty: Lost Sales Revenue Total Security Guard hours 1000 22 1400 28 1900 44 The least squares regression equation is Select one: a. Y=210.5+36.7 X b. none of the above C. Y=38.918+213.918 X d. Y=214.9+40.8 X e. Y=213.918+38.918 X