#include<cstdio>
#include<algorithm>
using namespace std;
int main(void)
{
	int n,i;
	double x1,y1,x2,y2,x3,y3,x4,y4,x;
	scanf("%d",&n);
	for(i=0;i<n;i++)	{
		scanf("%lf %lf %lf %lf %lf %lf %lf %lf",&x1,&y1,&x2,&y2,&x3,&y3,&x4,&y4);
		if((x2-x1==0) || (x4-x3==0))	{
			if((x2-x1==0) && (x4-x3==0))	{
				printf("YES\n");
			}
			else {
				printf("NO\n");
			}
		}
		else {
			x=(y2-y1)/(x2-x1)-(y4-y3)/(x4-x3);
			if(x<0.0000001 && x>-0.0000001)	{
				printf("YES\n");
			}
			else {
				printf("NO\n");
			}
		}
	}
	return 0;
}
