To analyze the intervals from June to December based on the points provided:
- 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 a consistent increase:
- From 0.2 inches in June to 0.45 inches in July.
- From 0.45 inches in July to 0.55 inches in August.
- From 0.55 inches in August to 0.7 inches in September.
- From 0.7 inches in September to 1.6 inches in October.
- From 1.6 inches in October to 2.4 inches in November.
- From 2.4 inches in November to 3.2 inches in December.
Thus, during the months from June to December, the average rainfall increases continuously.
The correct response is: the average rainfall increases.