In line charts showing trends,the vertical axis indicates time or quantity,and the horizontal axis indicates amount.

Line Charts

A type of chart that displays information as a series of data points connected by straight line segments, commonly used to visualize trends over time.

Vertical Axis

A line or scale along the side of a chart or graph that shows the value of something.

Horizontal Axis

In graphs and charts, the x-axis that runs left to right and typically represents the independent variable or time.