Math

Questions 13 and 14 refer to the following information.


What are all values of x that satisfy the given equation? Three colonies of insects were each treated with a different pesticide over an 8-week period to test the effectiveness of the three pesticides. Colonies A, B, and C were treated with Pesticides A, B, and C, respectively. Each pesticide was applied every 2 weeks to one of the three colonies over the 8-week period. The bar graph above shows the insect counts for each of the three colonies 0, 2, 4, 6, and 8 weeks after the initial treatment.
13
Which of the following colonies showed a decrease in size every two weeks after the initial treatment with pesticide?
I. Colony A
II. Colony B
III. Colony C