This product is also available at a discount as a part of my Data and Graphing Lesson and Activity Bundle found here: http://www.teacherspayteachers.com/Product/Data-and-Graphing-Lesson-and-Activity-Bundle
This folder contains two data analysis assessments with answers. These would be appropriate for pre-assessments, formative assessments, and/or post assessments.
Graphs included are bar graphs, line graphs, pictographs, line plots, and Venn diagrams.
The first assessment covers reading graphs and the second assessment covers vocabulary and graph types.
The files may be edited to your needs.