In the coordinate plane, points (x, 1) and (10, y) are on line k. If line k passes through the origin and has slope 1/4, then x + y = Select the correct option:
A) 6.5 B) 7 C) 8 D) 11 E) 12
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 (10, y) = (10,2.5) --&gt; x+y=4+2.5= 
<gadget id="calculator">4+2.5</gadget>
<output>6.5</output>
6.5   6.5nswer: 6.5.
<result>A</result>
In the coordinate plane, points (x, 1) and (10, y) are on line k. If line k passes through the origin and has slope 1/4, then x + y =