In the coordinate plane, points (x, 1) and (10, y) are on line k. If line k passes through the origin and has slope 1/2, then x + y =
(A) 4.5
(B) 7
(C) 8
(D) 11
(E) 12
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(A) 4.5
(B) 7
(C) 8
(D) 11
(E) 12
