In the diagram below, triangle ABC is similar to triangle DEF.

Which of the following proportions can be used to find the value of n?
-A
-B
-C
-D

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