Determine which equation is belongs to the graph of the limacon curve below. [-5,5] by [-5,5]
A. r=1-3 sin 0
B. r= 2+2 sin 0
C. r =3-2 sin 0
D. r= 2-2 sin 0

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