F school yall should teach us how to avoid toxic people and how to be there for others and how to pay bills instead of useless bs like the Pythagorean theorem

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