A line chart is ideal for tracking continuous changes such as rates or ratios over time. Combined with range markers and text annotations, it can highlight meaningful thresholds directly on the plot area.
This sample displays debt-to-income (DTI) ratios for three counties from 1986 to 2006 across three line series. Four colored range axis markers divide the Y axis into affordability zones—from “Buy!” (below 28%) to “Not affordable” (above 48%)—while text markers annotate each zone. Y-axis labels are formatted as percentages, a dual Y axis is enabled, and a legend allows interactive series toggling.
Follow the step-by-step Line Chart Tutorial to learn how such charts are built. See the Line Chart documentation for all configuration options.