#include <iostream>
#include <cmath>
#include <complex>
using namespace std;
typedef complex<double> xy_t;
double cross_product(xy_t a, xy_t b){
  return (conj(a)*b).imag();
}

const double eps = 1e-11;
double x[4], y[4];
int N;
int main(){
  cin >> N;
  for(int t=0; t<N; t++){
    for(int i=0; i<4; i++){
      cin >> x[i] >> y[i];
    }
    xy_t a[2] = {
      xy_t(x[0],y[0]) - xy_t(x[1],y[1]),
      xy_t(x[2],y[2]) - xy_t(x[3],y[3])
    };
    bool p = abs(cross_product(a[0], a[1])) < eps;
    cout << (p ? "YES" : "NO") << endl;

  }
}

