A scout leader wants to motivate the girls in her troop. By showing the number of boxes of cookies each girl has sold so far, she can compare the girls' success rate in selling the cookies. Valeryia has sold 20 boxes, Erin has sold 36 boxes, Cora has sold 12 boxes, and Elisia has sold 24 boxes. Which type of graph provides the best visual representation of this set of data: a line graph, a bar graph, or a circle graph?

The graph that provides the best visual representation of the data is a _____ graph.