Exyi by = E(X; - X) (Y, - Y) by = E(X, - X) ( Y, - Y) E(X; - X)2 b1 = Y - box E(X, - X)2 EX, Y; - nXY EX? - nX2 e; = actual Y, - predicted Y = Yi - Yi x, = (X; - X) and y; = (Y; - Y) = Y; - b1 - b2X; X b1 E ( X, - X)(Y - Y) E (X - X) SUMS SUMS Index ( X, - X) ( Y - Y ) ( X, - X) ( Y - Y) ( Xi - X) ei 1 381 163.45 2 185 118.25 3 337 219.65 4 239 162.55 227 113.15 214 81.3 7 112 113.4 135 133.75 9 208 105.6 10 392 153.4