Excel could be used for graphs making and analysing. For example, in a study where it is related the time spending study to the grade obtained, we can put the data on the Excel and do a scatter chart with a line which will help understand what is the relation between one variable and the other, and if it is a dramatic relation, or not. The line equation can also be calculated through this graph, as well as the R², which helps indicate the accuracy of the relation the line represents.
Through Excel, you can also build tables and introduce formulas for different cells in order to create, for example, a budget table.
On Excel, several calculations can be made - Excel can be used to treat data, for example through calculations involving such data.