The test measures both the download and upload speed of your connection so the waiting time depends on how fast your Internet connection is. On average, the test takes about 20 to 40 seconds.

Key fact The gradient of speed-time and velocity-time graphs represent acceleration. The area under a speed-time graph represents the distance travelled.

Key fact The gradient of speed-time and velocity-time graphs represent acceleration. The area under a speed-time graph represents the distance travelled.

Lumbering, Netflix streaming speeds on got you down and out? Check out our quick-hit guide for on how to test your Netflix streaming speed online.

To check how fast your internet is, Google "internet speed test" and click the blue "Run speed test" button.

YouTube is testing visual indicators for the most viewed portion of a video above the playback progress bar on mobile and desktop.

Consider the following three key questions the next time you see a graph, map or other data visual so you can confidently decide what to do with that new nugget of information.