If we are drawing altitude from R the PQ will be base of this triangle. So we can say Median from R will cut on Midpoint of PQ. So firstly we will find mid point of PQ Which is S given as below: P(4,-1) , Q (-2,7)
Let Co-ordinate of S is (x,y) So
So midpoint of PQ is S(1,3).
Now we can find equation of RS Co-ordinate of R is (9,9) and and S is (1,3).