To analyze the average rainfall from June to December based on the given points:
- June: 0.2 inches
- July: 0.45 inches
- August: 0.55 inches
- September: 0.7 inches
- October: 1.6 inches
- November: 2.4 inches
- December: 3.2 inches
From June to December, the average rainfall shows the following trend:
- From June (0.2) to July (0.45), it increases.
- From July (0.45) to August (0.55), it continues to increase.
- From August (0.55) to September (0.7), it increases again.
- From September (0.7) to October (1.6), it increases significantly.
- From October (1.6) to November (2.4), it increases further.
- From November (2.4) to December (3.2), it also continues to increase.
Overall, from June to December, the average rainfall increases consistently.
Therefore, the correct response is: the average rainfall increases.