In the coordinate plane, points (x, 1) and (4, y) are on line k. If line k passes through the origin and has slope 1/4, then x + y =  Select
A) 1 B) 2 C) 4 D) 5 E) 7
Line k passes through the origin and has slope 1/4 means that its equation is y=1/4*x.   Thus: (x, 1)=(4, 1) and (4, y) = (4,1) --&gt; x+y=4+1= 
<gadget id="calculator">4+1</gadget>
<output>5</output>
5.   Answer: 5
<result>D</result>
In the coordinate plane, points (x, 1) and (4, y) are on line k. If line k passes through the origin and has slope 1/4, then x + y =