8.4. Double Bar Graphs http://www.ck12.org
Robbie is trying to find out if any of the 4 food options would be desirable for the cafeteria menu. Using his survey
results and plotting the yes votes versus no votes on a double bar graph, he should be able to quickly see that
fish burgers and brown rice would be good choices for new items on the menu. Although many students did vote
for carrot soup, the same number did not. Therefore, it would be a gamble to place this item on the new menu.
Vegetarian pizza received more no votes than yes votes, so Robbie should not place this item on the menu.
Guided Practice
The grade 12 biology class did a survey to see what color eyes their classmates had and if there was a connection
between eye color and sex. The following data was recorded:
TABLE8.6:
Eye color Males Females
Blue 5 5
Green 6 8
Brown 3 4
Hazel 4 3Draw a double bar graph to represent the data, and draw any conclusions that you can from the resulting chart.
Answer:
The double bar graph is as follows: