Use a line visualization to show trends over time.
A line visualization can compare trends and cycles, infer relationships between variables, or show how a single variable is performing over time.
For an effective line visualization, use a time column in the x-axis, such as years, quarters, months, or days. If the x-axis shows something else, such as Canada, Netherlands, UK, and US, use a bar or column visualization.
For example, this line visualization shows the trend in course costs by department over year.