#include <iostream>
using namespace std;

int main(){
  double x1,y1,x2,y2,x3,y3,x4,y4,m1,m2;
  int n;
  cin>>n;
  while(n--){
    m1=0;
    m2=0;
    cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4;
    if(x1==x2)x2+=1;
      m1 =(y2-y1)/(x2-x1);
    
    if(x3==x4)x4+=1;
      m2 =(y4-y3)/(x4-x3);

    if(m1==m2&&m1!=0&&m2!=0)cout<<"YES"<<endl;
    else cout<<"NO"<<endl;
}
  return 0;
}