Line, Curve and Step charts are used to compare trends over time, categories, or some scale factor. These charts can use both bucketed and unbucketed category axis, can display optional markers in 2D charts, and can also be used to represent the trend of the contribution of each value to a total (Stacked), or the trend of the percentage each value contributes to a total (Stacked percent). Click on the chart's image on the right to see full-size chart.