If you need to make a chart or a graph in a hurry, point your web browser to OnlineChartTool.com. It's a web-based tool which allows you to create charts in nigh on a dozen different styles: bar, line, bar-line, area, pie, radar, scatter, bubble, meter, pyramid. It's relatively easy to get started and suitable for student assignments. (As always, play around with it yourself first.) You don't even need to create an account — though if you do, you'll be able to come back and edit your charts later.