#include <stdio.h>

int main(){
	int num;
	float x1, y1;
	float x2, y2;
	float x3, y3;
	float x4, y4;
	float vxa;
	float vya;
	float vxb;
	float vyb;
	float s;
				
	scanf("%d", &num);	
	for(int i = 0; i < num; i++){
		scanf("%f %f %f %f %f %f %f %f", &x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4);

		vxa = x2 - x1;
		vya = y2 - y1;
		vxb = x4 - x3;
		vyb = y4 - y3;
		s = vxa*vyb - vxb*vya;
		if(-0.000001 < s && s < 0.000001){
			printf("YES\n");
		}else{
			printf("NO\n");
		}
	}
	
	return 0;
}