#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||y1!=y2){m1 =(y2-y1)/(x2-x1);}
    if(x3!=x4||y3!=y4){m2 =(y4-y3)/(x4-x3);}

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