#include<iostream>
#include<cmath>
using namespace std;

int main(void){
	
	int n;
	double x1,x2,x3,x4,y1,y2,y3,y4;
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4;
		if((int)atan2(y2-y1,x2-x1)*1000000000==(int)atan2(y4-y3,x4-x3)*1000000000){
			cout<<"YES"<<endl;
		}
		else{
			cout<<"NO"<<endl;
		}
	}
	return 0;
}