Reading travel graphs A travel graph shows the distance travelled away from a set point against the time.

Area under speed-time graph = distance travelled (m). Summary ... What is an example of a speed-time graph? This is a speed-time graph for a car moving between two sets of traffic lights.

So, here is my first plot. This has the distance on the horizontal axis and the time on the vertical (since distance is the independent variable---that's what you would expect).

Planar Graph Algorithms and Distance Queries Publication Trend The graph below shows the total number of publications each year in Planar Graph Algorithms and Distance Queries.