#include<complex>
#include<iostream>
using namespace std;
int main(){const double E=1e-10;int n;double x1,y1,x2,y2,x3,y3,x4,y4;cin>>n;while(n--{cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4;cout<<((abs((y2-y1)*(x4-x3)-(y4-y3)*(x2-x1))<E)?"YES":"NO")<<endl;}}