When you draw a graph you will probably have to scale the data to fit nicely on the form. You will determine how big you want to graph to be, then find the largest value that you want to represent. Then find the ration that you will use for all of the values.
If you have data that looks like this graph:
You can not draw just the top of the graph, like this: That misrepresents the data and is unacceptable to statisticians.
About Graphs