#include <iostream>
#include <complex>
#include <cmath>
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; // 問題数
for (int t=0; t<N; ++t) {
  for (int i=0; i<4; ++i)
    cin >> x[i] >> y[i]; // x0,y0..x3,y3
    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])/2) < eps;
    cout << (p ? "YES" : "NO") << endl;

} }

