#include <cstdio>

int main(){
	int n;
	double a1, a2, x[4], y[4];
	
	scanf("%d", &n);
	for(int i = 0; i < n; i++){
		scanf("%lf %lf %lf %lf %lf %lf %lf %lf",
			&x[0], &y[0], &x[1], &y[1], &x[2], &y[2], &x[3], &y[3]);
		a1 = (y[0] - y[1]) *(x[0] - x[1]);
		a2 = (y[2] - y[3]) * (x[2] - x[3]);
		if(a1 == a2) printf("YES\n");
		else printf("NO\n");
	}
	return 0;
}