#include <iostream>
using namespace std;

int main(){
  double x1,y1,x2,y2,x3,y3,x4,y4,m1,m2;
  int n;
  cin>>n;
  while(n--){
    cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4;
    double a,b,c,d;
    a=y2-y1;
    b=y4-y3;
    c=x2-x1;
    d=x4-x3;
    if(a*c==b*d)cout<<"YES"<<endl;
    else cout<<"NO"<<endl;
}
  return 0;
}