Scatter graphs are a good way of displaying two sets of data to see if there is a correlation close correlationThe relationship between two sets of data. Usually described as positive or negative., or ...

Data can be presented in many ways that make it quicker and easier to read. In this section we will look at some of these ways. It is important to choose the best way to present data. A line graph can ...

If a picture is worth a thousand words, how much is a graph worth? For doctors trying to determine whether a patient's blood pressure is within normal range, the answer may depend on the type of graph ...