A date-and-cost line chart tracks a commodity's changing price over time. Economists use such diagrams to display broad market trends and predict future prices.

How to Make a Graph With Months in Excel. When you create a graph that includes dates, Excel 2013 automatically spaces the data in chronological order.

Use Word to create a chart from existing Excel data You don't need Microsoft Excel to chart data in an existing Excel file; you can simply import that data and chart it entirely in Microsoft Word.