Question 4 (1 point) Triangle RST has coordinates R(-1,7), S(3,-1), and T (9,2). Is this a right triangle? Prove your answer why or why not. O No, this is not a right triangle because none of the slopes are negative reciprocals of each other. Yes, RS is perpendicular to ST because their slopes are negative reciprocals of each other. Yes, RT is perpendicular to ST because their slopes are negative reciprocals of each other. Yes, RS is perpendicular to RT because their slopes are negative reciprocals of each other.