The coordinates of point s are given. the midpoint of rs is (6,-10). find the coordinates of point r. 10. s(0,8) 11. s(9,-3) 12. s(-2,-7)

Call the midpoint M. Then it must satisfy

... M = (R + S)/2

... 2M = R + S . . . . multiply the above equation by 2

... R = 2M -S . . . . . subtract S

Since we need to use this equation several times, it is convenient to calculate ...

... 2M = 2(6, -10) = (12, -20)

All we need to do is subtract the given value of S from this.

10. R = (12 -0, -20 -8) = (12, -28)

11. R = (12 -9, -20 -(-3)) = (3, -17)

12. R = (12 -(-2), -20 -(-7)) = (14, -13)

the median here is 25. your lowest value is 14 and highest value is 48. to find the third quartile, find the medium number in between 25 and 48 which would be 42 i believe.