Sandra wanted to test the effectiveness of various kitchen cleaners, so she performed the following experiment.
First, she prepared five agar plates with the same bacterial density (i.e., the same number of bacteria per plate). Then, she coated the entire agarose surface of one plate with 5 mLs of a particular kitchen cleaner. Finally, she repeated this step three more times using three other kitchen cleaners.
Her results appear in the data table below.
Plate # of Bacterial Colonies
Untreated Plate 24
Cleaner 1 22
Cleaner 2 8
Cleaner 3 12
Cleaner 4 4
Which graph below best represents Sandra's data?
1 answer
Since the data in the table shows the number of bacterial colonies on each plate, a bar graph would best represent Sandra's data. Each cleaner can be represented by a different colored bar, with the height of the bar representing the number of bacterial colonies on each plate. This way, it would be easy to compare the effectiveness of each cleaner in reducing bacterial growth.
1 answer