In the xy-coordinate system, if (m, n) and (m + 3, n + k) are two points on the line with the equation x = 2y + 5, then k =	Choose the correct option:
A) 1/2	B) 1	C) 2	D) 3/2	E) 4
Since (m, n) and (m + 2, n + k) are two points on the line with the equation x = 2y + 5 they should satisfy m=2n +5 and m+3 =2 *(n+k)+5.   By 1st equation we have m-2n=5 and by 2nd equation m-2n = 2k+2 ---&gt; 5=2k+2 ---&gt;k=3/2.   The answer is, therefore, (3/2).
<result>D</result>
In the xy-coordinate system, if (m, n) and (m + 3, n + k) are two points on the line with the equation x = 2y + 5, then k =