#include<iostream>
#include<math.h>

using namespace std;

int main()
{
	double x1,x2,x3,x4,y1,y2,y3,y4,rad1,rad2;
	int n,i;
	
	cin >> n ;
	
	for(i=0;i<n;i++)
	{
		cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> x4 >> y4 ;
		
		if(y2!=y1)
			rad1=atan((x2-x1)/(y2-y1));
		else
			rad1=100000000.0;
		if(y3!=y4)
			rad2=atan((x4-x3)/(y4-y3));
		else
			rad2=100000000.0;
		
		if(rad1==rad2)
			cout << "YES" << endl;
		else
			cout << "NO" << endl;
	}
}