The research productivity of academics at a university depends on their teaching load. In the table below, the teaching load (hours per week) of five academics and the number of publications (per year) are given. Teaching load Number of (hours) x y publications (x) (y) 8 7 56 64 49 12 5 60 144 25 16 4 64 256 16 20 2 40 400 4 25 1 25 625 1 The linear regression equation is: OA. y=-9.55-0.355x O B. y 9.55+0.355x OC. y=-9.55+0.355x OD. y 9.55 -0.355x