Excel's functionality includes chart options you can insert to add a title directly onto a line graph, so that you don't have to insert extra text boxes or type into the cells around the graph.

To launch it, either (1) right-click the edge of your chart and select "Format Chart Area," or (2) select your chart and click "Format Selection" in the Format tab on the ribbon.

How to Graph a Function in Excel. A mathematical function is a formula that takes an input, x, applies a set of calculations to it, and produces an output called y. By calculating a function at a ...