Excel is a spreadsheet ... visual representation. Bar charts are often used for comparing two or more sets of data, as they allow you to see which values have the highest and lowest numbers at once.

If you wish to create a bar graph in Excel, read through this article ... you would have to literally pick each value from the list, highlight the row and column one by one, and check which ...

If you understand the definition of a mathematical function, a good way to judge it is that any line drawn parallel to the y-axis intersects with the values in the function’s curve only once.

Use Excel's chart wizard to make a combo chart that combines two chart types, each with its own data set. Select the two sets of data you want to use to create the graph. Choose the "Insert" tab ...