In an experiment, 90 newborn flies are divided evenly into three separate
groups and placed in boxes inside an incubator that is maintained at a
constant temperature of 30°C. On a daily basis, the first group is given water
containing 1 mg/mL of sugar; the second is given water containing 2 mg/mL
of sugar, and the third is given water containing 3 mg/mL of sugar. After four
weeks, the average length of the flies in each group is determined.
What should be the title of the line graph that displays data from this
experiment?