#include <iostream>
using namespace std;

int main(){
  double a,b,c,d,e,f,g,h,m[4];
  int s;
  cin>>s;
  for(int j=0;j<s;j++){
    cin>>a>>b>>c>>d>>e>>f>>g>>h;
    m[0]=c-a;
    m[1]=g-e;
    m[2]=d-b;
    m[3]=h-f;
    if(m[2]*m[0]==m[3]*m[1])cout<<"YES"<<endl;
    else cout<<"NO"<<endl;
  }
  return 0;
}