This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
This image shows some kind of simple graph/chart that could be converted to a Wikichart. Storing graphs or charts as images makes it harder to change (correct or translate) them. Wikicharts also help making sure to be consistent in font and size.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.