A researcher places two colonies of bacteria into two petri dishes that each have an area of 10 square
centimeters. After the initial placement of the bacteria
(t = 0), the researcher measures and records the
area covered by the bacteria in each dish every ten
minutes. The data for each dish were fit by a smooth
curve, as shown in the graph, where each curve
represents the area of a dish covered by bacteria as a
function of time, in hours. Which of the following is a
correct statement about the data above?