#include <iostream>
#include <cmath>
using namespace std;
int main( void )
{
  int n;
  cin >> n;
  for( int i=0; i<n; i++ ){
    double x1,y1,x2,y2,x3,y3,x4,y4;
    cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4;
    if( fabs( atan2( y2-y1, x2-x1 ) - atan2( y4-y3,x4-x3 ) ) < 1e-9 )
      cout << "YES" << endl;
    else cout << "NO" << endl;
  }
  return 0;
}