#include<stdio.h>
int main(void){
	int i, n;
	scanf("%d", &n);
	for (i = 0; i < n; i++){
		double x1, y1, x2, y2, x3, y3, x4, y4, a;
		scanf("%lf%lf%lf%lf%lf%lf%lf%lf", &x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4);
		a = (y2 - y1) / (x2 - x1)
		  - (y4 - y3) / (x4 - x3);
		if (-0.000001<=a && a<=0.000001){
		printf("YES\n");
		}
		else{
			printf("NO\n");
		}
	}
	return 0;
}