you add all the numberes then you devide in by the amount of numbers. for example if i add 8, 2 and 6 i get 16 so i devide 16 by 3 because there ar three numberes, i get 5.333333 recurring (you might lern that later), that is the average.
but wen you use a graph and the points are 4,8,6,3,9,4 and 175 you do not count the 175 because it is way too high (and it would look bad in the graph).
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