how to adding data to an existing excel line chart
Use this data to make a column or line chart. The blank cell in the upper left of this range tells Excel that Value is the series names, and the dates in the first column are the category (X axis) labels.(I use dates in this example, but you could use any type of category labels.).se this data to make a column or line chart. The blank cell in the upper left of this range tells Excel that Value is the series names, and the dates in the first column are the category (X axis) labels.