|Good graph; quick to understand, |
well labelled, communicates a lot of data
The purpose of a graph is to communicate data in a clear, quick and easy to understand way, in order to support and expand upon the text. It is immediately clear upon looking at this first graph that the percentage of social networking users is increasing, due to the upward trend of the lines.
And not only is it easy to understand, but it is well labelled and communicates a lot of data. From this graph, we know that social networking is increasing, we know the rate of increase due to the gradient and we know when the increases are occurring. We also know that as the age groups get younger, the percentage of users increases.
|Poor graph; harder to understand, |
poorly labelled and communicates less information
In this scenario, a line graph was the best graph type to use.