#include <iostream>
#include <cmath>

#define PI 3.14159265358979323

using namespace std;

int main() {
	int n;
	double x1, y1, x2, y2, x3, y3, x4, y4;
	double deg1, deg2;
	double rad1, rad2;
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> x4 >> y4;
		rad1 = atan2(y2 - y1, x2 - x1);
		rad2 = atan2(y4 - y3, x4 - x3);
		deg1 = rad1 * 180 / PI;
		deg2 = rad2 * 180 / PI;
		if (deg1 == deg2)
			cout << "YES" << endl;
		else
			cout << "NO" << endl;
	}

	return 0;
}