ary = []
gets.to_i.times do
  ary << gets.split(" ").map(&:to_f)
end

ary.each do |v|
  x1, y1, x2, y2, x3, y3, x4, y4 = v
  if (x1 - x2)/(y1 - y2) == (x3 - x4)/(y3 - y4)
    puts :YES
  else
    puts :NO
  end
end