which one is better pick one

The data quality plays a role in limitations since the graph incorporates multiple counties and areas, impacting the overall validity of the following graph as the population grows, resulting in a drop in accuracy.
or
The following graph's overall validity is impacted by the data quality's role as it varies throughout different counties and regions, and as population growth causes accuracy to decline.

Both sentences express the same idea and use similar language, so it is a matter of personal preference. However, the second sentence may be more commonly used and easier to understand due to the use of more straightforward sentence structure and clearer cause and effect relationship.

Both phrases convey a similar message highlighting the impact of data quality on the validity of a graph, but the sentence structures and word choices differ slightly. It ultimately depends on personal preference and the context in which the sentence is being used. There is no definitive answer as to which one is "better."