main = getContents >>= mapM_ (putStrLn . parallelism . map (read::String->Double) . words) . tail . lines
parallelism [x1,y1,x2,y2,x3,y3,x4,y4]
 = if (y2-y1)/(x2-x1) == (y4-y3)/(x4-x3) then "YES" else "NO"