Reagan surveyed a number of her classmates about what time they usually go to bed. Of the fifteen classmates she asked, three said 9 p.m. What central angle measure would you use to represent this group on a circle graph?
Divide how many said they went to bed by how many she asked: 3/15=0.2. Multiply 0.2 by the number of angles in a circle: 0.2•360=72. 72 degrees is the answer :)
