The vertex form of h(x) = x2 – 14x + 6 is h(x) = (x – )2 – .

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