Triangle ABC and triangle PQR are similar and have the same orientation. The endpoints of the hypotenuse of triangle ABC are B(-5, -7) and C(-3, -3). The hypotenuse of triangle PQR is on the same line as the hypotenuse of triangle ABC and is twice the length of BC. What is the slope of the hypotenuse of triangle PQR? What are the coordinates of the hypotenuse of triangle PQR?