#include<iostream>
using namespace std;
typedef long long ll;
int main(){
    double x1,x2,x3,x4,y1,y2,y3,y4;
    int n;
    while(n--){
        cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> x4 >> y4;
        if(x1-x2==0||x4-x3==0){
            if(x1-x2==x4-x3){
                cout << "YES" << endl;
            }
            else{
                cout << "NO" << endl;
            }
        }
        else if((y1-y2)/(x1-x2)==(y4-y3)/(x4-x3))    cout << "YES"<<endl;
        else    cout << "NO"<<endl;
    }
}

