The timeline graph is used when you are comparing time (dates). A timeline shows fluctuations in a single metric (e.g., estimated earnings) for two different date ranges or multiple metrics for a single date range. You can switch between viewing activity by days, weeks or months using the new **Day**, **Week** and **Month** buttons. The "Month" button is particularly useful for reducing noise when you’re viewing reports with a long time line, such as an “All time” report.

This graph exhibits quantitative information or illustrates relationships between two changing variables (a time series) with a line that connects a series of data points. A line graph can identify trends, and shows an increasing, decreasing, fluctuating, or remaining ‘constant rate of change’.

The timeline is presented in two views:

- If one metric is selected, then the data is shown as a single line graph with a shaded area.
- If more than one metric is selected, then the data is shown as multiple line graphs with no shaded areas.

## X-, Y1- and Y2-axes

To help you read a graph and measure the information, graphs are plotted with the use of X and Y axes.

The X-axis is the line on the graph that runs horizontally from left to right. As value** x** increases, the point on the graph moves further right.

The Y-axis is the line on the graph that runs vertically from the bottom up. As the value of **y** increases, the point on the graph moves further up.

All measurements start from the value of zero where the X and Y axes intersect.

A Y2-axis is displayed as a second vertical line which appears on the right side of the graph. The Y2-axis enables you to see two sets of data on a single graph even when the values measured are different.

- X-axis: Represents the selected date range displayed as month and date.
- Y1-axis: In order of selection, the graph uses the first chosen metric as its value.
- Y2-axis: In order of selection, the graph uses the second chosen metric as its value.

**day**. The days are shown on the X-axis. You decide to display multiple metrics:

**Clicks**and

**CPC**, the Y-axis displays monetary values. The Y2-axis displays the CPC numerical values. Each line represents a selected metric; the color of the metric matches the color of the line graph.

## Rollover effect

Read along the X-, Y1- and Y2-axes. If you mouse over a point of intersection in the line graph, a statistical bubble appears with information about the metrics you have selected for that specific intersection in the report and the date for that point on the graph.