Investors who read stock charts use moving averages, price action and volume signals to sell. Add to that toolbox a simple straight line.

Scatter plots display individual data points, while line graphs connect these points, emphasizing trends over time. These charts are handy for identifying data correlations or deviations.

Playfair’s line graph of Navy expenditures, for instance, was concerned only with how that one variable changed over time. But, as the nineteenth century progressed, graphs began to break free ...

How to Make a Line Plot in PowerPoint. If you need a line chart, Microsoft PowerPoint 2010 can help you plot your line graph on any of the slides that make up your presentation.