Spreadsheet software can display information in a variety of different formats including as a table, as a graph or as a chart.
Many spreadsheets will allow you to create graphs that automatically reflect changes to numbers in the spreadsheet.
Spreadsheets are often used in business as models to predict what might happen in the real-world.
The simplest models are used to produce a break-even analysis for new businesses. The spreadsheet predicts when the profit made by a business is exactly zero.