If z is the midpoint of what are x, rz, and rt?

a. x = 18, rz = 134, and rt = 268
b. x = 22, rz = 150, and rt = 300
c. x = 20, rz = 150, and rt = 300
d. x = 20, rz = 300, and rt = 150 its a straight line r
8x-10 150

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school. each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220