#include <iostream>
#include <complex>
using namespace std;
int main() {
  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;
    complex<double> c1(x2 - x1, y2 - y1);
    complex<double> c2(x4 - x3, y4 - y3);
    cout << ((arg(c1) == arg(c2)) ? "YES" : "NO") << endl;
  }
}