8.4. Double Bar Graphs http://www.ck12.org
According to the double bar graph, volleyball and swimming seem to be almost equally liked by both the girls and
the boys. Therefore, these 2 sports would be the ones Kerry-Sue should choose to set up at the end-of-year Safe
Grad event.
Example B
Mrs. Smith teaches both academic and advanced math. She has been teaching these 2 courses for the past 4 years.
She decided she wanted to compare her grades to see how each class was doing over the past few years and see if
she has improved her class instruction at all. Her data can be found below:
TABLE8.4:
Marks Academic Math Advanced Math
2007 61.3 74.7
2008 67.9 80.3
2009 50.9 86.8
2010 63.7 81.5Draw a double bar graph and help Mrs. Smith determine if her class instruction has improved over the past 4 years.
The double bar graph is as follows: