An annual rainfall graph over a certain time period is used to show the amount of rainfall that an area received over a certain time period.
Annual rainfall graphs allow scientists and ordinary people to find out the trend of rainfall in an area so that they can see if rains are increasing, decreasing, or remaining the same.
Rainfall graphs have been very useful in tracking the effects of global warming because they showed that rainfall is increasing in many areas.
Find out more on rainfall graphs at https://brainly.com/question/26504435.
