Jenny was walking down a wood path for 4 minutes the elevation dropped steadily altogether it dropped 12 feet what was the change in elevation during the first minute

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