Which of the following represents data that continuously changes over periods of time? 

Data arranged in columns or rows on a worksheet can be plotted in a line chart. Line charts can display continuous data over time, are set against a standard scale, and are ideal for showing data trends at equal intervals. In a line chart, category data is distributed evenly along the horizontal axis, and all value data is distributed evenly along the vertical axis.

Hence, the answer is Line graph.