In the coordinate plane, line \(k\) passes through the origin and has slope \(2.\) If points \((3,y)\) and \((x,4)\) are

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In the coordinate plane, line \(k\) passes through the origin and has slope \(2.\) If points \((3,y)\) and \((x,4)\) are on line \(k,\) then \(x+y =\)

(A) 3.5
(B) 7
(C) 8
(D) 10
(E) 14

Answer: C

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