Charts and graphs can be produced in a specific program or by either a spreadsheet or database. Once you have entered the data and selected which type of chart or graph you want, the computer will then draw it for you automatically.
It is important to then make them easy to read and understand:
If you change any of the numbers in the original table then the computer will update the chart or graph automatically.
A finished chart could be printed out or included in a word processed document.