What is the inverse of the function f(x) = 2x + 1?

h(x) =1/2 x – 1/2
h(x) =1/2 x + 1/2
h(x) = 1/2 x – 2
h(x) = 1/2 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