#include <iostream>

using namespace std;

int main(){
	int n; cin >> n;
	for (int i = 0; i < n; i++) {
		double x1, y1, x2, y2, x3, y3, x4, y4;
		cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> x4 >> y4;
		double dx1 = x2-x1,
			   dy1 = y2-y1,
			   dx2 = x4-x3,
			   dy2 = y4-y3;
		
		if (dx2 * dy1 == dx1 * dy2) {
			if (dx1*dy1*dx2*dy2 != 0.0) {
				cout << "YES" << endl;
			} else {
				if (dx2+dy2 == 0.0 || dx1+dy1 == 0.0) {
					cout << "NO" << endl;
				}
			}
		} else {
			cout << "NO" << endl;
		}
	}
	return 0;
}