<p>It's from a college board test, and I can't get it</p>
<p>Here's a link to the problem...please give an explanation</p>
<p>help appreciated!</p>
<p><a href="http://db.tt/7ZExJVM%5B/url%5D">http://db.tt/7ZExJVM</a></p>
<p>well from glancing at the question the answer should be D or E,
give me a sec to work it out</p>
<p>bleh can’t seem to work it out atm,
i’d guess D and go with it 
do u have the answer?</p>
<p>its E. x=-6, y=2 so -6+2 = -4 /2 = -2
so it goes -6, -4, -2 and then since y = 2 then you choose E. </p>
<p>I cant say I figured it out w/ algebra but I noticed that x+y /2 was ahead of x+y so that told me that the value was negative. Since x+y was infront of x the value of y is positive. I then looked at the interval of y which was 2 and noticed 2 spaced intervals, so x must be a negative multiple of 2. I plugged in -4 which didnt work, then -6 and it worked. Pretty tricky :D</p>
<p>It’s E, but I’m going to have a really hard time explaining it haha. Basically, the distance between 0 and (x+y)/2 has to be the same as the distance between (x+y)/2 and (x+y). Kind of like 0-3-6 or (-4)-(-2)-0. So D is 0. Then, (x+y)-x=y. So the distance between those two points is y. So y+0=y, which means the answer is E.</p>