In the coordinate plane, points (x, 5) and (9, y) are on line k. If line k passes through the origin and has slope 5/9, then x - y =	Choose the correct choice from the following options:
A) 4	B) 6	C) 5	D) 8	E) 7
Line k passes through the origin and has slope 1/4 means that its equation is y=5/9*x.   Thus: (x, 5)=(9, 5) and (9, y) = (9,5) --&gt; x-y=9-5= 
<gadget id="calculator">9-5</gadget>
<output>4</output>
4.   4nswer: 4
<result>A</result>
In the coordinate plane, points (x, 5) and (9, y) are on line k. If line k passes through the origin and has slope 5/9, then x - y =