When you use a line plot you sometimes use it for making a prediction of something like for example, rain. So when you are doing a prediction of rain like when was there more rain in 2013 and 2014. This is what you are going to do, you are going to get out all of the data that you got from both years in a website lets just say. You then are going to put the fractions or numbers in order and it is important to put the numbers or fractions from least to greatest because it will make more sense. It is also important that in a line plot you have to be really careful about the lines that are above the the data because on top of those lines you will put the numbers or fractions of the numbers of the data.
You also have to be careful and accurate when you are doing a line plot because if you mess up your line plot will be really confusing and wrong. You cross the data numbers or fraction as you go putting them form least to greatest. Then after you have do all theses steps you will get your answer to your problem