Line-charts imply that data is continuously changing. If your data is discrete you might consider a bar-chart instead.
How to create your own
Create your own: comparative chart
Comparative charts are used to compare things such as performance, ranks, changes or characteristics. Basic comparative charts can be created in standard applications such as Excel using line graphs.
Effect plots work by identifying high-order terms in a generalised linear model, a statistical technique. Once these terms are identified fitted values are derived and plotted for the relevant groups.